leetcode/0100: sameTree.cpp at main · jmartinez159/leetcode · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
/**
 * Definition for a binary tree node.
 * struct TreeNode {
 *     int val;
 *     TreeNode *left;
 *     TreeNode *right;
 *     TreeNode() : val(0), left(nullptr), right(nullptr) {}
 *     TreeNode(int x) : val(x), left(nullptr), right(nullptr) {}
 *     TreeNode(int x, TreeNode *left, TreeNode *right) : val(x), left(left), right(right) {}
 * };
 */
class Solution {
public:
    bool isSameTree(TreeNode* p, TreeNode* q) {

        if(p == nullptr && q == nullptr){

            return true;
        }

        if(p != nullptr && q != nullptr){

            if(p->val != q->val){

                return false;
            }

            //checking to see if p->left matches q->left AND p->right matches q->right
            return isSameTree(p->left, q->left) && isSameTree(p->right, q->right);
        }

        return false;
    }
};