solution/3000-3099/3001.Minimum Moves to Capture The Queen/images/ex1.png |
737.9 KB |
633.7 KB |
14.1% |
solution/3500-3599/3548.Equal Sum Grid Partition II/images/1746840111-NLKmla-chatgpt-image-apr-2-2025-at-02_50_29-am.png |
271.1 KB |
217.4 KB |
19.8% |
solution/2800-2899/2812.Find the Safest Path in a Grid/images/example2.png |
58.0 KB |
41.2 KB |
28.9% |
solution/1200-1299/1226.The Dining Philosophers/images/an_illustration_of_the_dining_philosophers_problem.png |
134.3 KB |
123.5 KB |
8.1% |
solution/1100-1199/1111.Maximum Nesting Depth of Two Valid Parentheses Strings/images/1111.png |
52.6 KB |
42.4 KB |
19.4% |
solution/3200-3299/3203.Find Minimum Diameter After Merging Two Trees/images/example11-transformed.png |
20.0 KB |
11.4 KB |
42.8% |
solution/1400-1499/1444.Number of Ways of Cutting a Pizza/images/ways_to_cut_apple_1.png |
44.1 KB |
38.2 KB |
13.2% |
solution/1600-1699/1666.Change the Root of a Binary Tree/images/bt_image_1.png |
109.1 KB |
103.3 KB |
5.3% |
solution/1600-1699/1666.Change the Root of a Binary Tree/images/1727138189-YtDgTf-image.png |
109.1 KB |
103.3 KB |
5.3% |
solution/2200-2299/2266.Count Number of Texts/images/1200px-telephone-keypad2svg.png |
109.9 KB |
104.1 KB |
5.2% |
solution/0000-0099/0017.Letter Combinations of a Phone Number/images/1752723054-mfIHZs-image.png |
109.9 KB |
104.1 KB |
5.2% |
solution/0000-0099/0017.Letter Combinations of a Phone Number/images/1200px-telephone-keypad2svg.png |
109.9 KB |
104.1 KB |
5.2% |
lcp/LCP 65. 舒适的湿度/images/1663902759-dgDCxn-image.png |
59.6 KB |
54.6 KB |
8.4% |
solution/0200-0299/0223.Rectangle Area/images/rectangle-plane.png |
15.5 KB |
10.7 KB |
30.7% |
solution/0300-0399/0314.Binary Tree Vertical Order Traversal/images/image1.png |
54.6 KB |
50.1 KB |
8.2% |
solution/0300-0399/0314.Binary Tree Vertical Order Traversal/images/1727276130-UOKFsu-image.png |
54.6 KB |
50.1 KB |
8.2% |
solution/0300-0399/0314.Binary Tree Vertical Order Traversal/images/image3.png |
57.1 KB |
52.8 KB |
7.6% |
solution/0300-0399/0314.Binary Tree Vertical Order Traversal/images/1727276212-bzuKab-image.png |
57.1 KB |
52.8 KB |
7.6% |
solution/0100-0199/0130.Surrounded Regions/images/1718167191-XNjUTG-image.png |
18.8 KB |
14.5 KB |
23.0% |
solution/0100-0199/0133.Clone Graph/images/133_clone_graph_question.png |
57.8 KB |
53.6 KB |
7.4% |
lcp/LCP 75. 传送卷轴/images/1681714676-gksEMT-image.png |
62.3 KB |
58.1 KB |
6.7% |
solution/0500-0599/0572.Subtree of Another Tree/images/1724998698-sEJWnq-image.png |
17.2 KB |
13.7 KB |
20.1% |
solution/2800-2899/2812.Find the Safest Path in a Grid/images/example3.png |
51.7 KB |
48.4 KB |
6.5% |
solution/1300-1399/1388.Pizza With 3n Slices/images/sample_3_1723.png |
20.0 KB |
16.9 KB |
15.7% |
solution/1100-1199/1192.Critical Connections in a Network/images/critical-connections-in-a-network.png |
8.7 KB |
5.7 KB |
34.3% |
solution/1300-1399/1388.Pizza With 3n Slices/images/sample_4_1723.png |
18.2 KB |
15.3 KB |
16.4% |
solution/1400-1499/1485.Clone Binary Tree With Random Pointer/images/e2.png |
29.4 KB |
26.5 KB |
9.7% |
solution/1400-1499/1485.Clone Binary Tree With Random Pointer/images/clone_3.png |
29.4 KB |
26.5 KB |
9.7% |
solution/0500-0599/0533.Lonely Pixel II/images/1694957797-UWXAxl-image.png |
11.4 KB |
8.6 KB |
24.6% |
lcp/LCP 67. 装饰树/images/1663577920-sjrAYH-image.png |
21.6 KB |
18.8 KB |
12.9% |
solution/1800-1899/1828.Queries on Number of Points Inside a Circle/images/chrome_2021年03月25日_22-42-07.png |
30.4 KB |
27.7 KB |
9.1% |
solution/1300-1399/1344.Angle Between Hands of a Clock/images/sample_3_1673.png |
24.3 KB |
21.5 KB |
11.2% |
solution/1400-1499/1485.Clone Binary Tree With Random Pointer/images/e3.png |
27.4 KB |
24.7 KB |
9.9% |
solution/0500-0599/0587.Erect the Fence/images/erect_the_fence_1.png |
22.2 KB |
19.5 KB |
12.1% |
solution/0700-0799/0723.Candy Crush/images/candy_crush_example_2.png |
28.1 KB |
25.5 KB |
9.4% |
solution/1400-1499/1430.Check If a String Is a Valid Sequence from Root to Leaves Path in a Binary Tree/images/leetcode_testcase_2.png |
19.1 KB |
16.7 KB |
12.6% |
solution/0900-0999/0941.Valid Mountain Array/images/hint_valid_mountain_array.png |
17.7 KB |
15.3 KB |
13.6% |
solution/0900-0999/0952.Largest Component Size by Common Factor/images/ex3.png |
22.1 KB |
19.7 KB |
10.9% |
solution/1300-1399/1344.Angle Between Hands of a Clock/images/sample_1_1673.png |
25.9 KB |
23.5 KB |
9.1% |
lcp/LCP 76. 魔法棋盘/images/1681714596-beaOHK-image.png |
22.7 KB |
20.4 KB |
10.3% |
solution/1700-1799/1724.Checking Existence of Edge Length Limited Paths II/images/messed.png |
21.8 KB |
19.5 KB |
10.5% |
solution/1900-1999/1932.Merge BSTs to Create Single BST/images/d1.png |
8.9 KB |
6.7 KB |
24.4% |
solution/3500-3599/3535.Unit Conversion II/images/example2.png |
16.6 KB |
14.5 KB |
12.6% |
lcp/LCP 70. 沙地治理/images/1662692507-mgFXRj-image.png |
24.2 KB |
22.1 KB |
8.6% |
solution/1400-1499/1430.Check If a String Is a Valid Sequence from Root to Leaves Path in a Binary Tree/images/leetcode_testcase_1.png |
18.0 KB |
16.0 KB |
11.2% |
solution/2200-2299/2280.Minimum Lines to Represent a Line Chart/images/1920px-pushkin_population_historysvg.png |
29.1 KB |
27.1 KB |
6.8% |
solution/0400-0499/0457.Circular Array Loop/images/1723688159-qYjpWT-image.png |
7.5 KB |
5.5 KB |
26.1% |
lcp/LCP 42. 玩具套圈/images/1629194157-RiOAuy-image.png |
11.9 KB |
10.0 KB |
16.2% |
solution/0000-0099/0038.Count and Say/images/1629874763-TGmKUh-image.png |
19.9 KB |
18.0 KB |
9.7% |
solution/1900-1999/1932.Merge BSTs to Create Single BST/images/d3.png |
4.8 KB |
3.0 KB |
38.6% |
solution/0100-0199/0158.Read N Characters Given read4 II - Call Multiple Times/images/157_example.png |
27.5 KB |
25.7 KB |
6.8% |
solution/0100-0199/0157.Read N Characters Given Read4/images/157_example.png |
27.5 KB |
25.7 KB |
6.8% |
solution/1300-1399/1349.Maximum Students Taking Exam/images/image.png |
17.4 KB |
15.6 KB |
10.6% |
solution/0500-0599/0588.Design In-Memory File System/images/filesystem.png |
35.2 KB |
33.4 KB |
5.2% |
solution/0900-0999/0909.Snakes and Ladders/images/snakes.png |
33.8 KB |
31.9 KB |
5.3% |
solution/1400-1499/1485.Clone Binary Tree With Random Pointer/images/clone_2.png |
26.4 KB |
24.7 KB |
6.5% |
solution/3100-3199/3123.Find Edges in Shortest Paths/images/graphhhh.png |
9.0 KB |
7.2 KB |
19.2% |
solution/0500-0599/0558.Logical OR of Two Binary Grids Represented as Quad-Trees/images/qt1.png |
25.9 KB |
24.2 KB |
6.5% |
solution/2000-2099/2039.The Time When the Network Becomes Idle/images/quiet-place-example1.png |
23.2 KB |
21.5 KB |
7.2% |
lcp/LCP 43. 十字路口的交通/images/1630393755-gyPeMM-图片.png |
24.7 KB |
23.0 KB |
6.8% |
solution/3100-3199/3100.Water Bottles II/images/exampleone1.png |
22.2 KB |
20.5 KB |
7.4% |
solution/3100-3199/3100.Water Bottles II/images/example231.png |
26.9 KB |
25.3 KB |
6.0% |
solution/2000-2099/2046.Sort Linked List Already Sorted Using Absolute Values/images/image-20211017201240-3.png |
18.5 KB |
17.0 KB |
8.4% |
lcp/LCP 62. 交通枢纽/images/1663902595-McsEkY-image.png |
19.6 KB |
18.1 KB |
7.9% |
solution/2300-2399/2320.Count Number of Ways to Place Houses/images/arrangements.png |
18.9 KB |
17.3 KB |
8.2% |
lcp/LCP 10. 二叉树任务调度/images/bef743a12591aafb9047dd95d335b8083dfa66e8fdedc63f50fd406b4a9d163a-image.png |
6.0 KB |
4.4 KB |
26.0% |
lcp/LCP 26. 导航装置/images/1597996826-EUQRyz-image.png |
15.4 KB |
13.9 KB |
9.9% |
lcp/LCP 21. 追逐游戏/images/1597991318-goeHHr-image.png |
11.3 KB |
9.8 KB |
13.4% |
solution/1700-1799/1728.Cat and Mouse II/images/sample_111_1955.png |
22.8 KB |
21.3 KB |
6.5% |
solution/1400-1499/1485.Clone Binary Tree With Random Pointer/images/e1.png |
20.3 KB |
18.8 KB |
7.3% |
solution/0500-0599/0587.Erect the Fence/images/erect_the_fence_2.png |
16.3 KB |
14.9 KB |
8.9% |
solution/2100-2199/2152.Minimum Number of Lines to Cover Points/images/image-20220123200057-3.png |
10.0 KB |
8.5 KB |
14.4% |
solution/1800-1899/1801.Number of Orders in the Backlog/images/ex1.png |
14.6 KB |
13.2 KB |
9.7% |
lcp/LCP 26. 导航装置/images/1597996812-tqrgwu-image.png |
18.7 KB |
17.3 KB |
7.6% |
lcp/LCP 52. 二叉搜索树染色/images/1649833948-arSlXd-image.png |
22.6 KB |
21.3 KB |
6.1% |
images/recommender-fly51fly.png |
18.7 KB |
17.3 KB |
7.4% |
solution/0500-0599/0505.The Maze II/images/maze_1_example_2.png |
12.6 KB |
11.2 KB |
11.0% |
solution/0400-0499/0490.The Maze/images/maze_1_example_2.png |
12.6 KB |
11.2 KB |
11.0% |
lcp/LCP 78. 城墙防线/images/1681717918-tWywrp-image.png |
17.7 KB |
16.3 KB |
7.8% |
solution/1800-1899/1828.Queries on Number of Points Inside a Circle/images/chrome_2021年03月25日_22-34-16.png |
16.4 KB |
15.0 KB |
8.3% |
solution/0600-0699/0633.Sum of Square Numbers/images/table.png |
11.6 KB |
10.3 KB |
11.7% |
solution/3100-3199/3157.Find the Level of Tree with Minimum Sum/images/image_2024年05月17日_16-15-46.png |
15.2 KB |
13.8 KB |
8.9% |
solution/0400-0499/0427.Construct Quad Tree/images/e1tree.png |
21.4 KB |
20.0 KB |
6.3% |
solution/0500-0599/0572.Subtree of Another Tree/images/1724998676-cATjhe-image.png |
21.0 KB |
19.7 KB |
6.4% |
solution/2000-2099/2046.Sort Linked List Already Sorted Using Absolute Values/images/image-20211017201318-4.png |
12.3 KB |
11.0 KB |
10.8% |
solution/1000-1099/1080.Insufficient Nodes in Root to Leaf Paths/images/insufficient-11.png |
12.5 KB |
11.2 KB |
10.6% |
solution/1000-1099/1080.Insufficient Nodes in Root to Leaf Paths/images/insufficient-1.png |
12.5 KB |
11.2 KB |
10.6% |
solution/2100-2199/2103.Rings and Rods/images/ex1final.png |
14.3 KB |
13.0 KB |
9.1% |
lcci/16.20.T9/images/17_telephone_keypad.png |
17.2 KB |
15.9 KB |
7.5% |
solution/0300-0399/0351.Android Unlock Patterns/images/android-unlock.png |
6.3 KB |
5.0 KB |
20.3% |
lcp/LCP 62. 交通枢纽/images/1663902572-yOlUCr-image.png |
15.5 KB |
14.3 KB |
8.2% |
solution/3100-3199/3157.Find the Level of Tree with Minimum Sum/images/image_2024年05月17日_16-14-18.png |
12.0 KB |
10.8 KB |
10.4% |
solution/3100-3199/3123.Find Edges in Shortest Paths/images/graph35drawio-1.png |
10.7 KB |
9.5 KB |
11.5% |
solution/1300-1399/1334.Find the City With the Smallest Number of Neighbors at a Threshold Distance/images/problem1334example1.png |
11.0 KB |
9.8 KB |
11.1% |
solution/1500-1599/1516.Move Sub-Tree of N-Ary Tree/images/sample_4_964.png |
11.3 KB |
10.1 KB |
10.8% |
solution/1500-1599/1506.Find Root of N-Ary Tree/images/sample_4_964.png |
11.3 KB |
10.1 KB |
10.8% |
solution/1400-1499/1490.Clone N-ary Tree/images/sample_4_964.png |
11.3 KB |
10.1 KB |
10.8% |
solution/0500-0599/0590.N-ary Tree Postorder Traversal/images/sample_4_964.png |
11.3 KB |
10.1 KB |
10.8% |
solution/0500-0599/0589.N-ary Tree Preorder Traversal/images/sample_4_964.png |
11.3 KB |
10.1 KB |
10.8% |
solution/0500-0599/0559.Maximum Depth of N-ary Tree/images/sample_4_964.png |
11.3 KB |
10.1 KB |
10.8% |
solution/0400-0499/0429.N-ary Tree Level Order Traversal/images/sample_4_964.png |
11.3 KB |
10.1 KB |
10.8% |
solution/0400-0499/0428.Serialize and Deserialize N-ary Tree/images/sample_4_964.png |
11.3 KB |
10.1 KB |
10.8% |
solution/0400-0499/0428.Serialize and Deserialize N-ary Tree/images/1727093169-WGFOps-image.png |
11.3 KB |
10.1 KB |
10.8% |
solution/1900-1999/1932.Merge BSTs to Create Single BST/images/d4.png |
5.3 KB |
4.1 KB |
22.8% |
solution/0600-0699/0690.Employee Importance/images/1716170448-dKZffb-image.png |
16.2 KB |
15.0 KB |
7.4% |
solution/1700-1799/1782.Count Pairs Of Nodes/images/1614828447-GMnLVg-image.png |
22.1 KB |
20.9 KB |
5.4% |
solution/2700-2799/2764.Is Array a Preorder of Some Binary Tree/images/2.png |
12.3 KB |
11.1 KB |
9.7% |
solution/2800-2899/2852.Sum of Remoteness of All Cells/images/1-new.png |
10.4 KB |
9.3 KB |
10.9% |
solution/2700-2799/2773.Height of Special Binary Tree/images/3.png |
18.8 KB |
17.6 KB |
6.1% |
lcp/LCP 27. 黑盒光线反射/images/1598953840-DLiAsf-image.png |
19.4 KB |
18.3 KB |
5.8% |
solution/1400-1499/1485.Clone Binary Tree With Random Pointer/images/clone_1.png |
18.2 KB |
17.1 KB |
6.2% |
solution/1500-1599/1516.Move Sub-Tree of N-Ary Tree/images/untitled-diagramdrawio.png |
9.8 KB |
8.7 KB |
11.3% |
solution/2400-2499/2463.Minimum Total Distance Traveled/images/1667542984-OAIRFN-image.png |
7.2 KB |
6.1 KB |
15.0% |
solution/2000-2099/2086.Minimum Number of Food Buckets to Feed the Hamsters/images/example3.png |
10.0 KB |
8.9 KB |
10.8% |
solution/2000-2099/2077.Paths in Maze That Lead to Same Room/images/image-20211114164827-1.png |
11.7 KB |
10.6 KB |
9.1% |
lcp/LCP 46. 志愿者调配/images/1630061300-WuVkeF-image.png |
8.1 KB |
7.0 KB |
13.1% |
solution/2700-2799/2792.Count Nodes That Are Great Enough/images/1.png |
17.0 KB |
15.9 KB |
6.2% |
solution/3500-3599/3593.Minimum Increments to Equalize Leaf Paths/images/screenshot-2025年05月28日-at-135704.png |
9.8 KB |
8.8 KB |
10.4% |
solution/3500-3599/3593.Minimum Increments to Equalize Leaf Paths/images/1750474560-iuUALZ-screenshot-2025年05月28日-at-135704.png |
9.8 KB |
8.8 KB |
10.4% |
solution/1100-1199/1104.Path In Zigzag Labelled Binary Tree/images/tree.png |
11.6 KB |
10.6 KB |
8.3% |
solution/0900-0999/0994.Rotting Oranges/images/oranges.png |
12.6 KB |
11.7 KB |
7.6% |
solution/3300-3399/3373.Maximize the Number of Target Nodes After Connecting Trees II/images/3982-1.png |
10.3 KB |
9.3 KB |
9.3% |
solution/3300-3399/3372.Maximize the Number of Target Nodes After Connecting Trees I/images/3982-1.png |
10.3 KB |
9.3 KB |
9.3% |
solution/3500-3599/3535.Unit Conversion II/images/example1.png |
9.1 KB |
8.2 KB |
10.3% |
solution/0400-0499/0426.Convert Binary Search Tree to Sorted Doubly Linked List/images/bstdllreturnbst.png |
12.4 KB |
11.5 KB |
7.4% |
solution/1800-1899/1823.Find the Winner of the Circular Game/images/ic234-q2-ex11.png |
10.6 KB |
9.7 KB |
8.6% |
solution/1700-1799/1728.Cat and Mouse II/images/sample_2_1955.png |
13.5 KB |
12.5 KB |
6.8% |
solution/0300-0399/0373.Find K Pairs with Smallest Sums/images/demo.png |
15.7 KB |
14.8 KB |
5.8% |
solution/1300-1399/1315.Sum of Nodes with Even-Valued Grandparent/images/1473_ex1.png |
7.8 KB |
6.9 KB |
11.6% |
solution/1900-1999/1954.Minimum Garden Perimeter to Collect Enough Apples/images/1627790803-qcBKFw-image.png |
11.4 KB |
10.5 KB |
7.9% |
solution/1900-1999/1954.Minimum Garden Perimeter to Collect Enough Apples/images/1527_example_1_2.png |
11.4 KB |
10.5 KB |
7.9% |
solution/1200-1299/1242.Web Crawler Multithreaded/images/sample_2_1497.png |
14.6 KB |
13.7 KB |
6.2% |
solution/1200-1299/1236.Web Crawler/images/sample_2_1497.png |
14.6 KB |
13.7 KB |
6.2% |
lcp/LCP 34. 二叉树染色/images/1616126301-gJbhba-image.png |
7.2 KB |
6.3 KB |
12.4% |
solution/0800-0899/0894.All Possible Full Binary Trees/images/fivetrees.png |
10.8 KB |
9.9 KB |
8.2% |
solution/2300-2399/2385.Amount of Time for Binary Tree to Be Infected/images/image-20220625231744-1.png |
13.4 KB |
12.5 KB |
6.6% |
solution/1200-1299/1242.Web Crawler Multithreaded/images/urlhostname.png |
5.5 KB |
4.6 KB |
16.0% |
solution/1200-1299/1236.Web Crawler/images/urlhostname.png |
5.5 KB |
4.6 KB |
16.0% |
solution/2000-2099/2093.Minimum Cost to Reach City With Discounts/images/image-20211129222650-4.png |
11.4 KB |
10.6 KB |
7.7% |
solution/1200-1299/1260.Shift 2D Grid/images/e2.png |
11.2 KB |
10.3 KB |
7.8% |
solution/1200-1299/1260.Shift 2D Grid/images/e2-1.png |
11.2 KB |
10.3 KB |
7.8% |
solution/0400-0499/0427.Construct Quad Tree/images/962_quad_tree.png |
15.4 KB |
14.5 KB |
5.7% |
solution/0500-0599/0554.Brick Wall/images/a.png |
12.1 KB |
11.3 KB |
7.1% |
solution/1100-1199/1123.Lowest Common Ancestor of Deepest Leaves/images/sketch1.png |
13.0 KB |
12.1 KB |
6.6% |
solution/0800-0899/0865.Smallest Subtree with all the Deepest Nodes/images/sketch1.png |
13.0 KB |
12.1 KB |
6.6% |
solution/2000-2099/2093.Minimum Cost to Reach City With Discounts/images/image-20211129222429-1.png |
12.2 KB |
11.3 KB |
7.0% |
solution/0500-0599/0500.Keyboard Row/images/keyboard.png |
10.6 KB |
9.8 KB |
7.8% |
solution/2100-2199/2103.Rings and Rods/images/ex2final.png |
16.0 KB |
15.2 KB |
5.0% |
solution/2000-2099/2093.Minimum Cost to Reach City With Discounts/images/image-20211129222531-3.png |
9.1 KB |
8.3 KB |
8.9% |
solution/3600-3699/3615.Longest Palindromic Path in Graph/images/screenshot-2025年06月13日-at-230017.png |
7.4 KB |
6.6 KB |
10.9% |
solution/1200-1299/1242.Web Crawler Multithreaded/images/sample_3_1497.png |
12.0 KB |
11.2 KB |
6.7% |
solution/1200-1299/1236.Web Crawler/images/sample_3_1497.png |
12.0 KB |
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solution/2100-2199/2141.Maximum Running Time of N Computers/images/example1-fit.png |
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Graph/images/screenshot-2025年06月13日-at-230017.pngsolution/1200-1299/1242.Web Crawler Multithreaded/images/sample_3_1497.pngsolution/1200-1299/1236.Web Crawler/images/sample_3_1497.pnglcof2/剑指 Offer II 025. 链表中的两数相加/images/1626420025-fZfzMX-image.pngsolution/1100-1199/1145.Binary Tree Coloring Game/images/1480-binary-tree-coloring-game.pngsolution/0400-0499/0445.Add Two Numbers II/images/1626420025-fZfzMX-image.pngsolution/1900-1999/1973.Count Nodes Equal to Sum of Descendants/images/screenshot-2021年08月17日-at-17-16-50-diagram-drawio-diagrams-net.pngsolution/3600-3699/3615.Longest Palindromic Path in Graph/images/screenshot-2025年06月13日-at-230508.pngsolution/0400-0499/0499.The Maze III/maze_2_example_1.pngsolution/0400-0499/0499.The Maze III/images/maze_2_example_1.pngsolution/0400-0499/0490.The Maze/images/maze_2_example_1.pngsolution/0500-0599/0505.The Maze II/images/maze_1_example_1.pngsolution/0400-0499/0490.The Maze/images/maze_1_example_1.pnglcp/LCP 38. 守卫城堡/images/1614828208-oFlpVs-image.pngsolution/2000-2099/2086.Minimum Number of Food Buckets to Feed the Hamsters/images/example2.pngsolution/0600-0699/0690.Employee Importance/images/1716170929-dkWpra-image.pngsolution/0500-0599/0554.Brick Wall/images/brick_wall.pngsolution/3100-3199/3148.Maximum Difference Score in a Grid/images/grid1.pngsolution/1600-1699/1692.Count Ways to Distribute Candies/images/candies-1.pnglcp/LCP 60. 力扣泡泡龙/images/1648180809-XSWPLu-image.pngsolution/2400-2499/2498.Frog Jump II/images/example-2.pngsolution/2500-2599/2581.Count Number of Possible Root Nodes/images/ex-1.pngsolution/2000-2099/2049.Count Nodes With the Highest Score/images/example-1.pngsolution/2700-2799/2792.Count Nodes That Are Great Enough/images/2.pngsolution/3500-3599/3532.Path Existence Queries in a Graph I/images/1745660506-eNVQtC-screenshot-2025年03月26日-at-122249.pnglcof2/剑指 Offer II 047. 二叉树剪枝/images/1028.pngsolution/0800-0899/0814.Binary Tree Pruning/images/1028.pngsolution/2100-2199/2132.Stamping the Grid/images/ex1.pngsolution/0800-0899/0807.Max Increase to Keep City Skyline/images/807-ex1.pngsolution/1300-1399/1325.Delete Leaves With a Given Value/images/sample_1_1684.pngsolution/3300-3399/3373.Maximize the Number of Target Nodes After Connecting Trees II/images/3928-2.pngsolution/3300-3399/3372.Maximize the Number of Target Nodes After Connecting Trees I/images/3928-2.pngsolution/1900-1999/1970.Last Day Where You Can Still Cross/images/3.pngsolution/0400-0499/0457.Circular Array Loop/images/1723688199-nhaMuF-image.pngsolution/0400-0499/0431.Encode N-ary Tree to Binary Tree/images/narytreebinarytreeexample.pngsolution/2200-2299/2250.Count Number of Rectangles Containing Each Point/images/example1.pngsolution/2600-2699/2689.Extract Kth Character From The Rope Tree/images/example1.pngsolution/0400-0499/0499.The Maze III/maze_2_example_2.pngsolution/0100-0199/0147.Insertion Sort List/images/1724130432-zoOvdI-image.pngsolution/0400-0499/0499.The Maze III/images/maze_2_example_2.pngsolution/0400-0499/0490.The Maze/images/maze_2_example_2.pngsolution/1500-1599/1518.Water Bottles/images/sample_1_1875.pngsolution/3200-3299/3206.Alternating Groups I/images/image_2024年05月16日_23-47-491.pngsolution/1200-1299/1210.Minimum Moves to Reach Target with Rotations/images/image-1.pngsolution/2700-2799/2737.Find the Closest Marked Node/images/image_2023年06月13日_16-35-47.pngsolution/2700-2799/2764.Is Array a Preorder of Some Binary Tree/images/1.pnglcof2/剑指 Offer II 047. 二叉树剪枝/images/1028_1.pngsolution/3300-3399/3319.K-th Largest Perfect Subtree Size in Binary Tree/images/tmp74xnmpj4-1.pngsolution/0800-0899/0814.Binary Tree Pruning/images/1028_1.pngsolution/1700-1799/1786.Number of Restricted Paths From First to Last Node/images/restricted_paths_ex22.pngsolution/2300-2399/2313.Minimum Flips in Binary Tree to Get Result/images/operationstree.pngsolution/1800-1899/1861.Rotating the Box/images/rotatingtheboxleetcode3withstone.pngsolution/1200-1299/1252.Cells with Odd Values in a Matrix/images/e1.pngsolution/1000-1099/1028.Recover a Tree From Preorder Traversal/images/recover-a-tree-from-preorder-traversal.pngsolution/0500-0599/0576.Out of Boundary Paths/images/out_of_boundary_paths_1.pngsolution/1400-1499/1463.Cherry Pickup II/images/sample_2_1802.pngsolution/1000-1099/1022.Sum of Root To Leaf Binary Numbers/images/sum-of-root-to-leaf-binary-numbers.pngsolution/1400-1499/1443.Minimum Time to Collect All Apples in a Tree/images/min_time_collect_apple_1.pngsolution/1500-1599/1599.Maximum Profit of Operating a Centennial Wheel/images/wheeldiagram12.pngsolution/3000-3099/3068.Find the Maximum Sum of Node Values/images/screenshot-2023年11月10日-012641.pngsolution/2900-2999/2973.Find Number of Coins to Place in Tree Nodes/images/screenshot-2023年11月10日-012641.pngsolution/2100-2199/2192.All Ancestors of a Node in a Directed Acyclic Graph/images/e2.pngsolution/1400-1499/1463.Cherry Pickup II/images/sample_1_1802.pngsolution/2200-2299/2277.Closest Node to Path in Tree/images/image-20220514132158-1.pngsolution/3300-3399/3319.K-th Largest Perfect Subtree Size in Binary Tree/images/tmpresl95rp-1.pngsolution/1300-1399/1302.Deepest Leaves Sum/images/1483_ex1.pngsolution/2200-2299/2204.Distance to a Cycle in Undirected Graph/images/image-20220315154634-1.pnglcp/LCP 76. 魔法棋盘/images/1681714583-unbRox-image.pngsolution/1900-1999/1938.Maximum Genetic Difference Query/images/c2.pngsolution/3500-3599/3558.Number of Ways to Assign Edge Weights I/images/screenshot-2025年03月24日-at-055820.pngsolution/3500-3599/3558.Number of Ways to Assign Edge Weights I/images/1748074095-sRyffx-screenshot-2025年03月24日-at-055820.pngsolution/3500-3599/3559.Number of Ways to Assign Edge Weights II/images/screenshot-2025年03月24日-at-055820.pngsolution/3500-3599/3559.Number of Ways to Assign Edge Weights II/images/1748074095-sRyffx-screenshot-2025年03月24日-at-055820.pngsolution/0900-0999/0988.Smallest String Starting From Leaf/images/tree2.pngsolution/0300-0399/0304.Range Sum Query 2D - Immutable/images/304.pngsolution/2400-2499/2498.Frog Jump II/images/example-1.pngsolution/2600-2699/2689.Extract Kth Character From The Rope Tree/images/example2.pngsolution/1000-1099/1008.Construct Binary Search Tree from Preorder Traversal/images/1266.pngsolution/1000-1099/1028.Recover a Tree From Preorder Traversal/images/recover_tree_ex1.pngsolution/0900-0999/0988.Smallest String Starting From Leaf/images/tree3.pnglcp/LCP 38. 守卫城堡/images/1614828242-oveClu-image.pngsolution/2900-2999/2973.Find Number of Coins to Place in Tree Nodes/images/screenshot-2023年11月10日-012614.pnglcp/LCP 29. 乐团站位/images/1616125453-IIDpxg-image.pngsolution/3600-3699/3604.Minimum Time to Reach Destination in Directed Graph/images/screenshot-2025年06月06日-at-004757.pngsolution/2200-2299/2268.Minimum Number of Keypresses/images/image-20220505184346-1.pngsolution/1400-1499/1443.Minimum Time to Collect All Apples in a Tree/images/min_time_collect_apple_2.pngsolution/1200-1299/1252.Cells with Odd Values in a Matrix/images/e2.pngsolution/3500-3599/3528.Unit Conversion I/images/1745660099-FZhVTM-example1.pnglcof2/剑指 Offer II 026. 重排链表/images/1626420311-PkUiGI-image.pngsolution/1900-1999/1973.Count Nodes Equal to Sum of Descendants/images/screenshot-2021年08月17日-at-17-25-21-diagram-drawio-diagrams-net.pngsolution/0100-0199/0143.Reorder List/images/1626420311-PkUiGI-image.pngsolution/3600-3699/3656.Determine if a Simple Graph Exists/images/screenshot-2025年08月13日-at-24347-am.pngsolution/3000-3099/3068.Find the Maximum Sum of Node Values/images/screenshot-2023年11月10日-012513.pngsolution/2900-2999/2973.Find Number of Coins to Place in Tree Nodes/images/screenshot-2023年11月10日-012513.pngsolution/2700-2799/2737.Find the Closest Marked Node/images/image_2023年06月13日_16-34-38.pngsolution/1000-1099/1080.Insufficient Nodes in Root to Leaf Paths/images/insufficient-3.pnglcof2/剑指 Offer II 054. 所有大于等于节点的值之和/images/tree.pngsolution/1000-1099/1038.Binary Search Tree to Greater Sum Tree/images/tree.pngsolution/0500-0599/0538.Convert BST to Greater Tree/images/tree.pngsolution/2000-2099/2061.Number of Spaces Cleaning Robot Cleaned/images/image-20211101204736-2.pngsolution/1000-1099/1059.All Paths from Source Lead to Destination/images/485_example_2.pngsolution/0800-0899/0838.Push Dominoes/images/domino.pngsolution/2100-2199/2162.Minimum Cost to Set Cooking Time/images/1.pnglcp/LCP 29. 乐团站位/images/1616125411-WOblWH-image.pngsolution/0900-0999/0965.Univalued Binary Tree/images/screen-shot-2018年12月25日-at-50104-pm.pngsolution/2000-2099/2056.Number of Valid Move Combinations On Chessboard/images/a1.pngsolution/1600-1699/1660.Correct a Binary Tree/images/ex1v2.pngsolution/2000-2099/2086.Minimum Number of Food Buckets to Feed the Hamsters/images/example1.pngsolution/1500-1599/1598.Crawler Log Folder/images/sample_22_1957.pngsolution/2000-2099/2088.Count Fertile Pyramids in a Land/images/image.pngsolution/0300-0399/0375.Guess Number Higher or Lower II/images/graph.pngsolution/3500-3599/3593.Minimum Increments to Equalize Leaf Paths/images/screenshot-2025年05月28日-at-134018.pngsolution/3500-3599/3593.Minimum Increments to Equalize Leaf Paths/images/1750474560-QqQFdh-screenshot-2025年05月28日-at-134018.pngsolution/1600-1699/1669.Merge In Between Linked Lists/images/merge_linked_list_ex2.pngsolution/3100-3199/3157.Find the Level of Tree with Minimum Sum/images/image_2024年05月19日_19-07-20.pnglcp/LCP 67. 装饰树/images/1663575757-yRLGaq-image.pngsolution/0400-0499/0419.Battleships in a Board/images/1719200420-KKnzye-image.pngsolution/0800-0899/0850.Rectangle Area II/images/rectangle_area_ii_pic.pngsolution/1800-1899/1824.Minimum Sideway Jumps/images/ic234-q3-ex2.pngsolution/3200-3299/3206.Alternating Groups I/images/image_2024年05月16日_23-48-211.pngsolution/1000-1099/1035.Uncrossed Lines/images/142.pngsolution/1400-1499/1474.Delete N Nodes After M Nodes of a Linked List/images/sample_1_1848.pngsolution/3200-3299/3249.Count the Number of Good Nodes/images/screenshot-2024年06月03日-193552.pngsolution/1500-1599/1535.Find the Winner of an Array Game/images/q-example.pngsolution/1900-1999/1970.Last Day Where You Can Still Cross/images/1.pngsolution/2000-2099/2077.Paths in Maze That Lead to Same Room/images/image-20211114164851-2.pngsolution/1200-1299/1235.Maximum Profit in Job Scheduling/images/sample22_1584.pngsolution/0000-0099/0037.Sudoku Solver/images/250px-sudoku-by-l2g-20050714_solutionsvg.pngsolution/0000-0099/0037.Sudoku Solver/images/250px-Sudoku-by-L2G-20050714_solution.svg.pngsolution/0800-0899/0802.Find Eventual Safe States/images/picture1.pngsolution/1800-1899/1878.Get Biggest Three Rhombus Sums in a Grid/images/pc73-q4-ex1.pngsolution/0900-0999/0979.Distribute Coins in Binary Tree/images/tree4.pngsolution/1600-1699/1609.Even Odd Tree/images/sample_1_333_1966.pngsolution/1800-1899/1824.Minimum Sideway Jumps/images/ic234-q3-ex1.pngsolution/2300-2399/2374.Node With Highest Edge Score/images/image-20220620200212-3.pngsolution/1800-1899/1824.Minimum Sideway Jumps/images/ic234-q3-ex3.pnglcp/LCP 38. 守卫城堡/images/1614828255-uuNdNJ-image.pngsolution/1000-1099/1080.Insufficient Nodes in Root to Leaf Paths/images/insufficient-4.pngsolution/2400-2499/2493.Divide Nodes Into the Maximum Number of Groups/images/example1.pngsolution/3200-3299/3206.Alternating Groups I/images/image_2024年05月16日_23-50-441.pngsolution/0900-0999/0952.Largest Component Size by Common Factor/images/ex2.pngsolution/1600-1699/1634.Add Two Polynomials Represented as Linked Lists/images/ex1.pngsolution/2200-2299/2247.Maximum Cost of Trip With K Highways/images/image-20220418173304-1.pngsolution/2000-2099/2061.Number of Spaces Cleaning Robot Cleaned/images/image-20211101204703-1.pngsolution/1100-1199/1110.Delete Nodes And Return Forest/images/screen-shot-2019年07月01日-at-53836-pm.pngsolution/0900-0999/0988.Smallest String Starting From Leaf/images/image_1551131779.pngsolution/2100-2199/2127.Maximum Employees to Be Invited to a Meeting/images/05Dxh9.pngsolution/1300-1399/1379.Find a Corresponding Node of a Binary Tree in a Clone of That Tree/images/e4.pnglcp/LCP 70. 沙地治理/images/1662692397-VlvErS-image.pngsolution/2800-2899/2846.Minimum Edge Weight Equilibrium Queries in a Tree/images/graph-6-1.pngsolution/1000-1099/1080.Insufficient Nodes in Root to Leaf Paths/images/screen-shot-2019年06月11日-at-83301-pm.pngsolution/2000-2099/2050.Parallel Courses III/images/ex2.pngsolution/2100-2199/2158.Amount of New Area Painted Each Day/images/screenshot-2022年02月01日-at-17-17-45-diagram-drawio-diagrams-net.pngsolution/1300-1399/1373.Maximum Sum BST in Binary Tree/images/sample_1_1709.pngsolution/0200-0299/0218.The Skyline Problem/images/skyline2.pngsolution/2100-2199/2136.Earliest Possible Day of Full Bloom/images/1.pngsolution/1300-1399/1334.Find the City With the Smallest Number of Neighbors at a Threshold Distance/images/find_the_city_01.pngsolution/1300-1399/1319.Number of Operations to Make Network Connected/images/sample_2_1677.pngsolution/2200-2299/2268.Minimum Number of Keypresses/images/image-20220505203823-1.pngsolution/2900-2999/2925.Maximum Score After Applying Operations on a Tree/images/graph-14-2.pngsolution/1300-1399/1376.Time Needed to Inform All Employees/images/1730_example_3_5.pngsolution/2600-2699/2624.Snail Traversal/images/screen-shot-2023年04月10日-at-100006-pm.pngsolution/2100-2199/2128.Remove All Ones With Row and Column Flips/images/image-20220103181204-7.pngsolution/0100-0199/0101.Symmetric Tree/images/1698026966-JDYPDU-image.pnglcp/LCP 58. 积木拼接/images/1650509082-wObiEp-middle_img_v2_c2d91eb5-9beb-4c06-9726-f7dae149d86g.pngsolution/2300-2399/2368.Reachable Nodes With Restrictions/images/ex1drawio.pngsolution/0700-0799/0799.Champagne Tower/images/tower.pnglcci/17.21.Volume of Histogram/images/rainwatertrap.pngsolution/1000-1099/1028.Recover a Tree From Preorder Traversal/images/screen-shot-2019年04月10日-at-114955-pm.pngsolution/0000-0099/0042.Trapping Rain Water/images/rainwatertrap.pngsolution/1000-1099/1028.Recover a Tree From Preorder Traversal/images/recover_tree_ex2.pngsolution/1300-1399/1322.Ads Performance/images/sql1.pngsolution/3500-3599/3575.Maximum Good Subtree Score/images/screenshot-2025年04月29日-at-151747.pngsolution/3500-3599/3575.Maximum Good Subtree Score/images/1749281526-aAsfns-screenshot-2025年04月29日-at-151747.pngsolution/1500-1599/1506.Find Root of N-Ary Tree/images/narytreeexample.pngsolution/1400-1499/1490.Clone N-ary Tree/images/narytreeexample.pngsolution/0500-0599/0590.N-ary Tree Postorder Traversal/images/narytreeexample.pngsolution/0500-0599/0589.N-ary Tree Preorder Traversal/images/narytreeexample.pngsolution/0500-0599/0559.Maximum Depth of N-ary Tree/images/narytreeexample.pngsolution/0400-0499/0429.N-ary Tree Level Order Traversal/images/narytreeexample.pngsolution/0400-0499/0428.Serialize and Deserialize N-ary Tree/images/narytreeexample.pngsolution/0400-0499/0428.Serialize and Deserialize N-ary Tree/images/1727093143-BPVnoI-image.pnglcof/面试题36. 二叉搜索树与双向链表/images/bstdlloriginalbst.pngsolution/0400-0499/0426.Convert Binary Search Tree to Sorted Doubly Linked List/images/bstdlloriginalbst.pngsolution/1300-1399/1367.Linked List in Binary Tree/images/sample_2_1720.pngsolution/2100-2199/2174.Remove All Ones With Row and Column Flips II/images/image-20220213162716-1.pngsolution/1100-1199/1138.Alphabet Board Path/images/azboard.pngsolution/3600-3699/3625.Count Number of Trapezoids II/images/desmos-graph-4.pngsolution/2500-2599/2581.Count Number of Possible Root Nodes/images/ex-2.pngsolution/2200-2299/2265.Count Nodes Equal to Average of Subtree/images/image-20220315203925-1.pngsolution/1500-1599/1572.Matrix Diagonal Sum/images/sample_1911.pngsolution/1400-1499/1437.Check If All 1's Are at Least Length K Places Away/images/sample_1_1791.pngsolution/0900-0999/0965.Univalued Binary Tree/images/screen-shot-2018年12月25日-at-50050-pm.pngsolution/2100-2199/2141.Maximum Running Time of N Computers/images/example1-fit.pngsolution/1600-1699/1669.Merge In Between Linked Lists/images/merge_linked_list_ex1.pngsolution/2200-2299/2293.Min Max Game/images/example1drawio-1.pngsolution/1000-1099/1080.Insufficient Nodes in Root to Leaf Paths/images/insufficient-2.pngsolution/2600-2699/2685.Count the Number of Complete Components/images/screenshot-from-2023年04月11日-23-31-23.pngsolution/2200-2299/2242.Maximum Score of a Node Sequence/images/ex2.pngsolution/2100-2199/2136.Earliest Possible Day of Full Bloom/images/2.pngsolution/0100-0199/0199.Binary Tree Right Side View/images/tmpd5jn43fs-1.pngsolution/1300-1399/1339.Maximum Product of Splitted Binary Tree/images/sample_1_1699.pngsolution/1000-1099/1059.All Paths from Source Lead to Destination/images/485_example_4.pngsolution/0900-0999/0988.Smallest String Starting From Leaf/images/tree1.pngsolution/2400-2499/2463.Minimum Total Distance Traveled/images/1667542978-utuiPv-image.pngsolution/0900-0999/0999.Available Captures for Rook/images/1253_example_3_improved.pngsolution/0300-0399/0302.Smallest Rectangle Enclosing Black Pixels/images/302_smallest_rectangle_enclosing_black_pixels.pngsolution/3500-3599/3585.Find Weighted Median Node in Tree/images/screenshot-2025年05月26日-at-193857.pngsolution/1900-1999/1992.Find All Groups of Farmland/images/screenshot-2021年07月27日-at-12-23-15-copy-of-diagram-drawio-diagrams-net.pngsolution/3400-3499/3493.Properties Graph/images/image.pngsolution/3400-3499/3493.Properties Graph/images/1742665594-CDVPWz-image.pngsolution/2400-2499/2421.Number of Good Paths/images/149d3065ec165a71a1b9aec890776ff.pngsolution/2500-2599/2596.Check Knight Tour Configuration/images/knight.pngsolution/1100-1199/1197.Minimum Knight Moves/images/knight.pngsolution/0900-0999/0935.Knight Dialer/images/knight.pngsolution/0600-0699/0688.Knight Probability in Chessboard/images/knight.pngsolution/1900-1999/1902.Depth of BST Given Insertion Order/images/1.pngsolution/2200-2299/2203.Minimum Weighted Subgraph With the Required Paths/images/example1drawio.pngsolution/1600-1699/1669.Merge In Between Linked Lists/images/ll.pngsolution/1600-1699/1669.Merge In Between Linked Lists/images/1709608717-NVGojm-image.pngsolution/2500-2599/2584.Split the Array to Make Coprime Products/images/second.pngsolution/2100-2199/2123.Minimum Operations to Remove Adjacent Ones in Matrix/images/image-20211223181518-2.pngsolution/2000-2099/2065.Maximum Path Quality of a Graph/images/ex2drawio.pngsolution/2100-2199/2174.Remove All Ones With Row and Column Flips II/images/image-20220213162737-2.pngsolution/1400-1499/1459.Rectangles Area/images/rect.pngsolution/2100-2199/2196.Create Binary Tree From Descriptions/images/example1drawio.pngsolution/1800-1899/1861.Rotating the Box/images/rotatingtheboxleetcodewithstones.pngsolution/0800-0899/0833.Find And Replace in String/images/833-ex1.pnglcof2/剑指 Offer II 022. 链表中环的入口节点/images/linked-list-cycle-ii.pnglcci/02.08.Linked List Cycle/images/linked-list-cycle-ii.pngsolution/3300-3399/3313.Find the Last Marked Nodes in Tree/images/screenshot-2024年06月03日-210550.pngsolution/2500-2599/2596.Check Knight Tour Configuration/images/1694590028-CTMBQL-image.pngsolution/0100-0199/0142.Linked List Cycle II/images/linked-list-cycle-ii.pngsolution/2800-2899/2846.Minimum Edge Weight Equilibrium Queries in a Tree/images/graph-9-1.pngsolution/1000-1099/1091.Shortest Path in Binary Matrix/images/example2_2.pngsolution/0800-0899/0833.Find And Replace in String/images/833-ex2-1.pngsolution/3200-3299/3245.Alternating Groups III/images/screenshot-from-2024年06月03日-20-24-12.pngsolution/2600-2699/2676.Throttle/images/screen-shot-2023年04月08日-at-120313-pm.pngsolution/2700-2799/2756.Query Batching/images/throttle.pngsolution/1700-1799/1786.Number of Restricted Paths From First to Last Node/images/restricted_paths_ex1.pngsolution/2500-2599/2596.Check Knight Tour Configuration/images/yetgriddrawio-5.pngsolution/2500-2599/2596.Check Knight Tour Configuration/images/1694590044-AmhkRb-image.pngsolution/3200-3299/3249.Count the Number of Good Nodes/images/tree1.pnglcp/LCP 15. 游乐园的迷宫/images/595b60797d4a461287864a8cd05bba1d3b8760104ff83f43b902fd68477be9c3-Screenshot 2020年03月20日 at 17.04.58.pngsolution/1900-1999/1993.Operations on Tree/images/untitled.pngsolution/1200-1299/1260.Shift 2D Grid/images/e1.pngsolution/1200-1299/1260.Shift 2D Grid/images/e1-1.pngsolution/2900-2999/2950.Number of Divisible Substrings/images/old_phone_digits.pngsolution/2600-2699/2603.Collect Coins in a Tree/images/graph-2.pngsolution/1600-1699/1606.Find Servers That Handled Most Number of Requests/images/load-1.pngsolution/3500-3599/3543.Maximum Weighted K-Edge Path/images/1746838989-dlWmbI-screenshot-2025年04月10日-at-061406.pngsolution/3200-3299/3208.Alternating Groups II/images/screenshot-2024年05月28日-184128.pngsolution/0000-0099/0085.Maximal Rectangle/images/1722912576-boIxpm-image.pnglcp/LCP 42. 玩具套圈/images/1629194140-ydKiGF-image.pngsolution/1300-1399/1377.Frog Position After T Seconds/images/frog_2.pngsolution/2400-2499/2471.Minimum Number of Operations to Sort a Binary Tree by Level/images/image-20220918174026-3.pngsolution/2900-2999/2925.Maximum Score After Applying Operations on a Tree/images/graph-13-1.pngsolution/1300-1399/1379.Find a Corresponding Node of a Binary Tree in a Clone of That Tree/images/e1.pngsolution/1400-1499/1474.Delete N Nodes After M Nodes of a Linked List/images/sample_2_1848.pngsolution/1300-1399/1367.Linked List in Binary Tree/images/sample_1_1720.pngsolution/2300-2399/2368.Reachable Nodes With Restrictions/images/ex2drawio.pngsolution/2100-2199/2192.All Ancestors of a Node in a Directed Acyclic Graph/images/e1.pngsolution/2000-2099/2003.Smallest Missing Genetic Value in Each Subtree/images/case-1.pngsolution/2000-2099/2002.Maximum Product of the Length of Two Palindromic Subsequences/images/case-1.pngsolution/1400-1499/1478.Allocate Mailboxes/images/sample_11_1816.pngsolution/1900-1999/1902.Depth of BST Given Insertion Order/images/2.pngsolution/2200-2299/2285.Maximum Total Importance of Roads/images/ex1drawio.pngsolution/0900-0999/0979.Distribute Coins in Binary Tree/images/tree3.pngsolution/0900-0999/0931.Minimum Falling Path Sum/images/1729566282-dtXwRd-image.pngsolution/2800-2899/2867.Count Valid Paths in a Tree/images/example2.pngsolution/1000-1099/1059.All Paths from Source Lead to Destination/images/485_example_1.pngsolution/2600-2699/2608.Shortest Cycle in a Graph/images/cropped.pnglcp/LCP 57. 打地鼠/images/1650273183-nZIijm-middle_img_v2_d5d09656-0616-4a80-845e-ece461c5ba9g.pngsolution/1000-1099/1028.Recover a Tree From Preorder Traversal/images/recover_tree_ex3.pngsolution/2200-2299/2204.Distance to a Cycle in Undirected Graph/images/image-20220315154238-1.pngsolution/2400-2499/2477.Minimum Fuel Cost to Report to the Capital/images/a4c380025e3ff0c379525e96a7d63a3.pngsolution/1300-1399/1386.Cinema Seat Allocation/images/cinema_seats_3.pngsolution/0900-0999/0971.Flip Binary Tree To Match Preorder Traversal/images/1219-02.pngsolution/3200-3299/3208.Alternating Groups II/images/screenshot-2024年05月28日-183057.pngsolution/1300-1399/1325.Delete Leaves With a Given Value/images/sample_2_1684.pngsolution/2100-2199/2162.Minimum Cost to Set Cooking Time/images/2.pngsolution/2100-2199/2132.Stamping the Grid/images/ex2.pngsolution/2000-2099/2045.Second Minimum Time to Reach Destination/images/e2.pngsolution/3600-3699/3625.Count Number of Trapezoids II/images/desmos-graph-3.pngsolution/2000-2099/2045.Second Minimum Time to Reach Destination/images/e1.pngsolution/1200-1299/1214.Two Sum BSTs/images/ex2.pngsolution/2000-2099/2065.Maximum Path Quality of a Graph/images/ex31drawio.pngsolution/2100-2199/2106.Maximum Fruits Harvested After at Most K Steps/images/1.pngsolution/2600-2699/2685.Count the Number of Complete Components/images/screenshot-from-2023年04月11日-23-32-00.pngsolution/2600-2699/2603.Collect Coins in a Tree/images/graph-4.pngsolution/2000-2099/2005.Subtree Removal Game with Fibonacci Tree/images/image-20210914173425-1.pngsolution/1600-1699/1609.Even Odd Tree/images/sample_2_1966.pngsolution/3100-3199/3148.Maximum Difference Score in a Grid/images/moregridsdrawio-1.pngsolution/1700-1799/1719.Number Of Ways To Reconstruct A Tree/images/tree.pngsolution/0900-0999/0993.Cousins in Binary Tree/images/q1248-01.pngsolution/1300-1399/1376.Time Needed to Inform All Employees/images/graph.pngsolution/1400-1499/1483.Kth Ancestor of a Tree Node/images/1528_ex1.pngsolution/1800-1899/1861.Rotating the Box/images/rotatingtheboxleetcode2withstones.pngsolution/0900-0999/0998.Maximum Binary Tree II/images/maximum-binary-tree-2-2.pngsolution/2000-2099/2075.Decode the Slanted Ciphertext/images/exam1.pngsolution/1300-1399/1391.Check if There is a Valid Path in a Grid/images/main.pngsolution/3500-3599/3575.Maximum Good Subtree Score/images/screenshot-2025年04月29日-at-150754.pngsolution/3500-3599/3575.Maximum Good Subtree Score/images/1749281526-IiXefp-screenshot-2025年04月29日-at-150754.pngsolution/2100-2199/2181.Merge Nodes in Between Zeros/images/ex2-1.pnglcof2/剑指 Offer II 023. 两个链表的第一个重合节点/images/160_statement.pnglcof/面试题52. 两个链表的第一个公共节点/images/160_statement.pngsolution/2100-2199/2127.Maximum Employees to Be Invited to a Meeting/images/ex1.pngsolution/0100-0199/0160.Intersection of Two Linked Lists/images/160_statement.pngsolution/3000-3099/3004.Maximum Subtree of the Same Color/images/20231216-134026.pngsolution/1400-1499/1466.Reorder Routes to Make All Paths Lead to the City Zero/images/sample_1_1819.pngsolution/0500-0599/0510.Inorder Successor in BST II/images/285_example_34.pngsolution/1000-1099/1066.Campus Bikes II/1261_example_2_v2.pnglcof2/剑指 Offer II 098. 路径的数目/images/robot_maze.pnglcci/08.02.Robot in a Grid/images/robot_maze.pngsolution/2000-2099/2069.Walking Robot Simulation II/images/example-1.pngsolution/1200-1299/1261.Find Elements in a Contaminated Binary Tree/images/1261_example_2_v2.pngsolution/1000-1099/1066.Campus Bikes II/images/1261_example_2_v2.pngsolution/1000-1099/1057.Campus Bikes/images/1261_example_2_v2.pngsolution/0000-0099/0062.Unique Paths/images/robot_maze.pngsolution/0000-0099/0062.Unique Paths/images/1697422740-adxmsI-image.pngsolution/2000-2099/2078.Two Furthest Houses With Different Colors/images/eg1.pngsolution/2000-2099/2050.Parallel Courses III/images/ex1.pngsolution/2000-2099/2019.The Score of Students Solving Math Expression/images/student_solving_math.pngsolution/3200-3299/3245.Alternating Groups III/images/screenshot-from-2024年06月03日-20-25-02-2.pngsolution/1300-1399/1361.Validate Binary Tree Nodes/images/1503_ex4.pngsolution/1300-1399/1319.Number of Operations to Make Network Connected/images/sample_1_1677.pngsolution/3300-3399/3331.Find Subtree Sizes After Changes/images/graphex1drawio.pngsolution/2000-2099/2054.Two Best Non-Overlapping Events/images/picture5.pngsolution/2400-2499/2458.Height of Binary Tree After Subtree Removal Queries/images/binaryytreeedrawio-2.pngsolution/2500-2599/2583.Kth Largest Sum in a Binary Tree/images/binaryytreeedrawio-2.pngsolution/3200-3299/3208.Alternating Groups II/images/screenshot-2024年05月28日-184240.pngsolution/2400-2499/2477.Minimum Fuel Cost to Report to the Capital/images/2.pngsolution/2800-2899/2814.Minimum Time Takes to Reach Destination Without Drowning/images/ex1.pngsolution/3400-3499/3419.Minimize the Maximum Edge Weight of Graph/images/s-1.pngsolution/2400-2499/2481.Minimum Cuts to Divide a Circle/images/alldrawio.pngsolution/3100-3199/3112.Minimum Time to Visit Disappearing Nodes/images/output-onlinepngtools-1.pngsolution/1700-1799/1782.Count Pairs Of Nodes/images/screenshot-from-2021年02月11日-23-07-35.pnglcof/lcof.pngsolution/2400-2499/2497.Maximum Star Sum of a Graph/images/max-star-sum-descdrawio.pngsolution/2100-2199/2158.Amount of New Area Painted Each Day/images/screenshot-2022年02月01日-at-17-19-49-diagram-drawio-diagrams-net.pngsolution/2000-2099/2065.Maximum Path Quality of a Graph/images/ex1drawio.pngsolution/1900-1999/1970.Last Day Where You Can Still Cross/images/2.pngsolution/2200-2299/2285.Maximum Total Importance of Roads/images/ex2drawio.pngsolution/3000-3099/3067.Count Pairs of Connectable Servers in a Weighted Tree Network/images/example11.pngsolution/2600-2699/2699.Modify Graph Edge Weights/images/graph.pngsolution/1300-1399/1377.Frog Position After T Seconds/images/frog_3.pngsolution/3600-3699/3615.Longest Palindromic Path in Graph/images/screenshot-2025年06月13日-at-230714.pngsolution/2300-2399/2360.Longest Cycle in a Graph/images/graph4drawio-5.pngsolution/0700-0799/0787.Cheapest Flights Within K Stops/images/cheapest-flights-within-k-stops-1drawio.pngsolution/3600-3699/3620.Network Recovery Pathways/images/graph-10.pngsolution/3000-3099/3067.Count Pairs of Connectable Servers in a Weighted Tree Network/images/example22.png1254 images did not require optimisation.