Commit afc46ee

author

Shuo

authored

Merge pull request #419 from openset/develop

Add: Convert Sorted Array to Binary Search Tree

2 parents 264e8ad + f5893ea commit afc46eeCopy full SHA for afc46ee

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Lines changed: 20 additions & 0 deletions

Original file line number	Diff line number	Diff line change
`@@ -1 +1,21 @@`
`1`	`1`	`package convert_sorted_array_to_binary_search_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 sortedArrayToBST(nums []int) *TreeNode {`
	`14`	`+ var node *TreeNode`
	`15`	`+ if l := len(nums); l > 0 {`
	`16`	`+ node = &TreeNode{Val: nums[l/2]}`
	`17`	`+ node.Left = sortedArrayToBST(nums[0 : l/2])`
	`18`	`+ node.Right = sortedArrayToBST(nums[l/2+1:])`
	`19`	`+ }`
	`20`	`+ return node`
	`21`	`+}`

Lines changed: 27 additions & 0 deletions

Original file line number	Diff line number	Diff line change
`@@ -1 +1,28 @@`
`1`	`1`	`package convert_sorted_array_to_binary_search_tree`
	`2`	`+`
	`3`	`+import (`
	`4`	`+ "reflect"`
	`5`	`+ "testing"`
	`6`	`+`
	`7`	`+ . "github.com/openset/leetcode/internal/kit"`
	`8`	`+)`
	`9`	`+`
	`10`	`+type caseType struct {`
	`11`	`+ input []int`
	`12`	`+ expected []int`
	`13`	`+}`
	`14`	`+`
	`15`	`+func TestSortedArrayToBST(t *testing.T) {`
	`16`	`+ tests := [...]caseType{`
	`17`	`+ {`
	`18`	`+ input: []int{-10, -3, 0, 5, 9},`
	`19`	`+ expected: []int{0, -3, 9, -10, 5},`
	`20`	`+ },`
	`21`	`+ }`
	`22`	`+ for _, tc := range tests {`
	`23`	`+ output := TreeNode2SliceInt(sortedArrayToBST(tc.input))`
	`24`	`+ if !reflect.DeepEqual(output, tc.expected) {`
	`25`	`+ t.Fatalf("input: %v, output: %v, expected: %v", tc.input, output, tc.expected)`
	`26`	`+ }`
	`27`	`+ }`
	`28`	`+}`

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