100_Same_Tree.cpp

#include <bits/stdc++.h>
using namespace std;

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) {}
};

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