100. Same Tree

/**
 * Definition for a binary tree node.
 * struct TreeNode {
 *     int val;
 *     TreeNode *left;
 *     TreeNode *right;
 *     TreeNode(int x) : val(x), left(NULL), right(NULL) {}
 * };
 */
static int wing=[]()
{
    std::ios::sync_with_stdio(false);
    cin.tie(NULL);
    return 0;
}();

class Solution 
{
public:
    bool isSameTree(TreeNode* p, TreeNode* q) 
    {
        if(p==NULL||q==NULL)
            return p==q;
        if(p->val!=q->val)
            return false;
        return isSameTree(p->left,q->left)&&isSameTree(p->right,q->right);
    }
};

递归判定