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30 | 30 | | **0028** | [Find the Index of the First Occurrence in a String][28] | Two Pointers, String, String Matching | ![][medium] | | |
31 | 31 | | **0035** | [Search Insert Position][35] | Array, BS | ![][easy] | | |
32 | 32 | | **0037** | [Sudoku Solver][37] | Array, Backtracking, Matrix | ![][hard] | | |
| 33 | +| **0041** | [First Missing Positive][41] | Array, Hash Table | ![][hard] | | |
| 34 | +| **0042** | [Trapping Rain Water][42] | Array, Two Pointers, Dynamic Programming, Stack, Monotonic Stack | ![][hard] | | |
33 | 35 | | **0051** | [N-Queens][51] | Array, Backtracking | ![][hard] | | |
34 | 36 | | **0053** | [Maximum Subarray][53] | Array, Divide and Conquer, DP | ![][medium] | | |
35 | 37 | | **0055** | [Jump Game][55] | Array, Dynamic Programming, Greedy | ![][medium] | | |
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98 | 100 | | **0263** | [Ugly Number][263] | Math | ![][easy] | | |
99 | 101 | | **0268** | [Missing Number][268] | Array, Hash Table, Math, Binary Search, Bit Manipulation, Sorting | ![][easy] | | |
100 | 102 | | **0278** | [First Bad Version][278] | Binary Search, Interactive | ![][easy] | | |
| 103 | +| **0279** | [Perfect Squares][279] | Math, Dynamic Programming, Breadth-First Search | ![][medium] | | |
101 | 104 | | **0283** | [Move Zeroes][283] | Array, Two Pointers | ![][easy] | | |
102 | 105 | | **0290** | [Word Pattern][290] | Hash Table, String | ![][easy] | | |
103 | 106 | | **0292** | [Nim Game][292] | Math, Brainteaser, Game Theory | ![][easy] | | |
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219 | 222 | [28]: ./solution/0001-0100/028%20-%20Find%20the%20Index%20of%20the%20First%20Occurrence%20in%20a%20String.md |
220 | 223 | [35]: ./solution/0001-0100/035%20-%20Search%20Insert%20Position.md |
221 | 224 | [37]: ./solution/0001-0100/037%20-%20Sudoku%20Solver.md |
| 225 | +[41]: ./solution/0001-0100/041%20-%20First%20Missing%20Positive.md |
| 226 | +[42]: ./solution/0001-0100/042%20-%20Trapping%20Rain%20Water.md |
222 | 227 | [51]: ./solution/0001-0100/051%20-%20N-Queens.md |
223 | 228 | [53]: ./solution/0001-0100/053%20-%20Maximum%20Subarray.md |
224 | 229 | [55]: ./solution/0001-0100/055%20-%20Jump%20Game.md |
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291 | 296 | [263]: ./solution/0201-0300/263%20-%20Ugly%20Number.md |
292 | 297 | [268]: ./solution/0201-0300/268%20-%20Missing%20Number.md |
293 | 298 | [278]: ./solution/0201-0300/278%20-%20First%20Bad%20Version.md |
| 299 | +[279]: ./solution/0201-0300/279%20-%20Perfect%20Squares.md |
294 | 300 | [283]: ./solution/0201-0300/283%20-%20Move%20Zeroes.md |
295 | 301 | [290]: ./solution/0201-0300/290%20-%20Word%20Pattern.md |
296 | 302 | [292]: ./solution/0201-0300/292%20-%20Nim%20Game.md |
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