[LC] 100. Same Tree
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Given two binary trees, write a function to check if they are the same or not.
Two binary trees are considered the same if they are structurally identical and the nodes have the same value.
/** * Definition for a binary tree node. * public class TreeNode { * int val; * TreeNode left; * TreeNode right; * TreeNode(int x) { val = x; } * } */ class Solution { public boolean isSameTree(TreeNode p, TreeNode q) { if (p == null && q == null) { return true; } else if (p == null && q != null || p != null && q == null) { return false; } else if (p.val != q.val) { return false; } return isSameTree(p.left, q.left) && isSameTree(p.right, q.right); } }
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