Commit 4f1c6de

author

Shuo

authored

Merge pull request #406 from openset/develop

Add: Maximum Depth of Binary Tree

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Lines changed: 22 additions & 0 deletions

Original file line number	Diff line number	Diff line change
`@@ -1 +1,23 @@`
`1`	`1`	`package maximum_depth_of_binary_tree`
	`2`	`+`
	`3`	`+import . "github.com/openset/leetcode/internal/kit"`
	`4`	`+`
	`5`	`+/**`
	`6`	`+ * Definition for a binary tree node.`
	`7`	`+ * type TreeNode struct {`
	`8`	`+ * Val int`
	`9`	`+ * Left *TreeNode`
	`10`	`+ * Right *TreeNode`
	`11`	`+ * }`
	`12`	`+ */`
	`13`	`+func maxDepth(root *TreeNode) int {`
	`14`	`+ if root == nil {`
	`15`	`+ return 0`
	`16`	`+ }`
	`17`	`+ l := maxDepth(root.Left) + 1`
	`18`	`+ r := maxDepth(root.Right) + 1`
	`19`	`+ if l > r {`
	`20`	`+ return l`
	`21`	`+ }`
	`22`	`+ return r`
	`23`	`+}`

Lines changed: 38 additions & 0 deletions

Original file line number	Diff line number	Diff line change
`@@ -1 +1,39 @@`
`1`	`1`	`package maximum_depth_of_binary_tree`
	`2`	`+`
	`3`	`+import (`
	`4`	`+ "testing"`
	`5`	`+`
	`6`	`+ . "github.com/openset/leetcode/internal/kit"`
	`7`	`+)`
	`8`	`+`
	`9`	`+type caseType struct {`
	`10`	`+ input []int`
	`11`	`+ expected int`
	`12`	`+}`
	`13`	`+`
	`14`	`+func TestMaxDepth(t *testing.T) {`
	`15`	`+ tests := [...]caseType{`
	`16`	`+ {`
	`17`	`+ input: []int{3, 9, 20, NULL, NULL, 15, 7},`
	`18`	`+ expected: 3,`
	`19`	`+ },`
	`20`	`+ {`
	`21`	`+ input: []int{1, 2, 3, NULL, 5, 6},`
	`22`	`+ expected: 3,`
	`23`	`+ },`
	`24`	`+ {`
	`25`	`+ input: []int{1, 2, NULL, NULL, 5},`
	`26`	`+ expected: 3,`
	`27`	`+ },`
	`28`	`+ {`
	`29`	`+ input: []int{1, NULL, 3, NULL, 5},`
	`30`	`+ expected: 3,`
	`31`	`+ },`
	`32`	`+ }`
	`33`	`+ for _, tc := range tests {`
	`34`	`+ output := maxDepth(SliceInt2TreeNode(tc.input))`
	`35`	`+ if output != tc.expected {`
	`36`	`+ t.Fatalf("input: %v, output: %v, expected: %v", tc.input, output, tc.expected)`
	`37`	`+ }`
	`38`	`+ }`
	`39`	`+}`

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