leetcode-com-explore-featured-card-july-leetcoding-challenge-545-week-2-july-8th-july-14th-3389.cpp

class Solution {
public:
    bool isSameTree(TreeNode* A, TreeNode* B) {
        if(A==NULL && B==NULL){
            return 1;
        }
        if(A==NULL || B==NULL){
            return 0;
        }
    return (A->val == B->val  && isSameTree(A->left,B->left) && isSameTree(A->right,B->right) );
    }
};