LeetCode 100. Same Tree

Given two binary trees, write a function to check if they are equal or not.

Two binary trees are considered equal if they are structurally identical and the nodes have the same value.

DFS题

class Solution {public:    bool isSameTree(TreeNode* p, TreeNode* q) {        if(!p && !q) return true;        if(p && !q || !p && q) return false;        if(isSameTree(p->left, q->left) && isSameTree(p->right, q->right) && p->val == q->val) return true;        else return false;            }};