Leetcode 108. Convert Sorted Array to Binary Search Tree
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public class Solution { public TreeNode sortedArrayToBST(int[] nums) { return helper(0, nums.length-1, nums); } // requires a balanced binary search tree, every time choosing mid of the array as root public static TreeNode helper(int low, int high, int[] nums) { if (low > high) return null; int mid = low + (high-low)/2; TreeNode root = new TreeNode(nums[mid]); root.left = helper(low, mid-1, nums);; root.right = helper(mid+1, high, nums);; return root; }} 0 0
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