【LeetCode】100. Same Tree

题解：二叉树的遍历，dfs

bool isSameTree(TreeNode* p, TreeNode* q) {
    if(p==NULL||q==NULL)return p==q;
    return p->val==q->val&&isSameTree(p->left,q->left)&&isSameTree(p->right,q->right);
}