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.
class Solution {
public:
bool isSameTree(TreeNode *p, TreeNode *q) {
// Start typing your C/C++ solution below
// DO NOT write int main() function
if(!p && !q)
return true;
if(p && q && p->val==q->val)
return isSameTree(p->left,q->left)&&isSameTree(p->right,q->right);
else
return false;
}
};