C++, my code wrong at big input?


  • 0
    F

    Similar idea from
    https://discuss.leetcode.com/topic/28180/c-solution-in-4-lines
    But instead of count length all the time, I update root answer with it's children.

    Here's my idea.
    If has left child, and child is 1 bigger than current node. Get 1+longestConsecutive(l)
    otherwise, longestConsecutive(l)

    Same as right child side

    return the max of above.

    /**
     * Definition for a binary tree node.
     * struct TreeNode {
     *     int val;
     *     TreeNode *left;
     *     TreeNode *right;
     *     TreeNode(int x) : val(x), left(NULL), right(NULL) {}
     * };
     */
    class Solution {
    public:
        int longestConsecutive(TreeNode* root) {
            if(root==NULL)return 0;
            int ans=1;
            if(root->left){
                int tmp = longestConsecutive(root->left);
                ans = max( ans, tmp);
                if(root->left->val == root->val+1 ){
                    ans = max( ans, tmp+1);
                }
            }if(root->right){
                int tmp = longestConsecutive(root->right);
                ans = max( ans, tmp);
                if(root->right->val == root->val+1 ){
                    ans = max( ans, tmp+1);
                }
            }
            return ans;
        }
    };
    

  • 0
    F

    @fakewen
    Output:
    6
    Expected:
    4

    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,8,5,3,3,1,0,0,4,4,6,5,4,1,1,3,2,9,9,4,2,1,4,5,8,7,5,4,9,3,9,6,1,8,3,3,4,0,0,7,3,1,5,8,7,7,3,1,5,3,5,2,8,9,8,3,8,8,5,0,7,0,4,4,3,9,6,8,8,1,7,2,5,4,2,6,4,8,3,4,3,5,3,9,4,7,6,8,2,8,6,9,4,6,9,7,5,0,2,0,3,3,3,1,8,6,0,2,9,2,6,6,5,5,2,1,8,6,0,3,8,5,9,7,8,7,9,2,1,9,8,4,8,8,3,3,3,6,1,3,1,6,0,4,3,8,1,8,8,0,6,4,3,8,1,8,5,7,1,7,7,8,0,5,0,3,0,2,7,7,6,6,0,8,3,0,6,9,9,7,1,6,4,7,0,4,3,7,2,6,9,2,9,8,2,9,6,8,5,7,3,2,7,0,3,2,3,8,5,1,6,4,7,5,6,6,9,3,3,3,0,0,5,5,1,1,5,9,8,9,8,1,0,8,0,7,3,5,5,1,7,8,5,8,6,3,3,7,2,9,1,8,6,1,9,4,2,9,7,3,6,9,9,3,0,1,4,6,0,5,4,8,9,3,4,9,1,9,0,5,0,5,1,4,7,2,1,4,9,4,4,6,6,9,1,4,5,7,4,4,9,8,2,6,2,6,3,9,8,4,8,8,9,0,9,0,2,6,4,4,8,0,5,4,1,3,3,9,1,1,7,3,9,1,1,2,5,0,2,0,4,1,8,4,2,9,2,7,8,6,9,6,0,3,1,4,1,5,4,5,7,7,0,4,2,3,9,4,4,8,4,6,1,3,1,7,8,6,5,2,3,8,6,9,0,4,6,6,4,3,7,3,8,6,2,2,5,7,9,6,1,0,1,2,9,2,1,8,4,5,3,3,5,1,1,3,0,9,4,8,2,3,5,0,6,6,3,7,0,5,5,8,6,9,8,9,1,7,9,7,7,0,2,4,1,3,1,8,0,6,7,8,9,1,4,7,7,8,6,7,5,3,9,7,6,8,7,2,8,0,5,9,5,2,5,8,3,4,9,2,6,8,7,6,5,9,5,7,6,5,9,0,6,8,9,6,7,6,9,2,8,5,3,7,5,6,9,1,2,7,2,2,5,8,4,5,7,3,7,8,5,2,8,9,8,9,1,2,3,8,9,6,8,3,2,2,9,3,6,3,7,6,7,0,9,2,9,5,0,6,1,6,5,3,8,4,8,9,0,7,9,1,9,7,3,3,7,8,4,4,3,7,6,5,4,4,5,5,0,0,0,4,1,7,8,1,9,3,8,9,1,1,3,1,3,1,3,4,2,4,2,2,2,4,4,6,8,3,0,0,3,2,4,6,4,6,2,4,1,1,2,4,4,0,8,6,7,9,2,9,4,7,4,1,5,0,1,8,7,7,6,9,3,5,6,3,8,6,1,9,3,1,8,7,9,3,3,3,3,4,9,7,1,5,0,0,7,2,1,5,3,7,1,4,3,4,5,7,7,0,1,2,6,8,3,1,0,3,4,1,2,8,4,7,1,9,6,7,2,3,5,6,2,0,2,5,7,1,9,5,0,9,0,6,3,8,5,3,6,8,1,9,9,9,7,4,7,4,9,7,0,3,2,9,8,3,5,6,8,4,1,1,2,0,2,7,8,4,4,9,2,2,8,8,0,0,0,2,0,9,9,0,1,7,2,4,1,7,8,2,5,1,7,4,8,4,4,6,0,8,7,7,8,5,5,5,1,6,2,2,1,5,2,9,5,8,5,5,0,0,9,4,0,1,1,1,9,7,5,5,6,9,0,8,4,4,1,8,7,3,5,3,9,2,5,7,8,9,7,3,7,2,2,9,4,4,8,7,0,8,6,7,1,2,8,9,7,0,5,2,8,1,1,8,0,4,3,7,6,3,5,9,4,3,5,6,0,8,2,4,6,6,9,0,2,6,5,1,6,1,2,5,1,2,9,9,2,9,2,4,3,8,6,5,9,3,0,0,1,1,7,1,1,1,1,4,1,3,5,5,5,1,6,8,5,0,5,0,7,7,9,0,0,0,4,5,4,3,9,2,0,1,7,5,3,2,2,4,7,4,9,8,7,4,3,1,0,7,1,4,6,3,5,1,0,4,1,1,3,3,7,0,1,8,6,0,1,4,4,8,3,2,9,6,3,7,1,6,6,0,5,4,0,9,3,8,9,2,7,2,0,7,9,9,8,1,1,9,0,8,4,9,0,2,3,3,0,3,0,4,5,8,7,7,7,8,2,4,6,0,5,6,6,0,2,2,8,5,2,6,2,7,0,1,4,2,1,3,0,9,3,8,4,1,1,6,4,0,0,4,4,7,9,2,0,4,1,6,5,2,7,7,6,4,4,1,3,4,5,7,1,6,0,8,4,6,1,3,1,4,0,2,9,1,6,2,7,2,1,7,6,1,8,0,5,4,1,7,2,6,2,5,0,5,1,3,1,8,8,0,6,7,9,4,2,8,1,3,2,3,0,5,1,0,7,8,4,1,1,6,3,0,5,5,2,9,0,5,4,9,3,7,3,3,6,6,9,3,9,8,2,4,9,7,2,7,1,4,4,9,7,9,1,8,8,8,5,7,4,5,6,1,0,3,6,6,4,3,0,7,2,6,2,6,6,0,0,0,5,8,8,4,3,4,8,5,8,3,4,4,0,9,5,7,1,4,9,6,8,1,4,8,6,4,4,2,7,1,2,1,2,3,6,2,4,6,1,0,3,8,5,4,3,2,3,4,4,8,0,7,0,3,9,7,8,0,1,9,0,7,5,7,6,6,6,2,4,6,6,5,2,7,3,4,1,6,0,9,0,1,6,8,8,7,0,8,0,0,9,8,6,3,3,0,2,2,8,6,1,3,5,8,0,6,6,8,2,1,2,8,9,9,7,3,9,0,3,7,0,6,5,8,3,2,7,7,5,6,3,0,6,5,7,5,3,8,7,5,2,4,1,0,2,3,4,2,1,0,9,2,1,5,9,5,1,2,5,5,8,0,5,1,4,7,1,7,0,7,1,9,3,8,2,8,9,5,7,9,7,9,6,2,7,4,0,3,2,7,3,0,7,9,8,5,3,8,2,4,4,4,2,1,6,2,1,3,0,5,1,4,9,8,2,0,7,5,4,9,8,9,8,9,9,5,1,0,6,7,3,5,9,0,4,8,0,6,4,8,7,1,1,3,5,0,0,3,8,7,4,5,2,8,7,7,7,1,6,7,0,7,4,8,7,5,7,5,3,3,0,3,2,4,8,8,3,1,3,0,9,7,4,6,8,0,7,4,0,4,7,1,1,0,7,8,9,1,9,7,3,2,8,6,7,5,0,2,8,0,6,3,5,7,5,7,9,7,0,8,9,9,7,3,5,3,4,1,4,6,4,1,6,1,3,5,7,7,3,0,7,3,3,4,8,4,2,5,3,6,1,7,5,1,8,9,7,0,0,6,2,6,6,3,1,2,9,2,5,7,0,6,0,5,3,6,9,7,2,1,3,5,0,0,2,2,2,2,1,9,0,2,3,7,7,6,9,4,7,3,9,7,7,4,5,4,4,3,0,8,1,1,6,8,2,4,1,7,3,8,6,8,2,4,2,8,0,5,9,8,3,6,1,7,3,8,8,0,6,6,0,3,6,6,9,9,7,5,6,1,1,9,6,8,1,3,4,4,5,7,0,9,3,2,5,5,2,3,4,8,9,9,2,5,8,3,4,7,6,6,3,5,3,4,6,0,2,6,3,8,5,9,6,1,5,5,5,7,5,3,0,3,3,2,6,8,1,0,2,3,1,4,7,6,8,2,5,3,9,3,5,4,0,4,7,4,3,5,3,6,9,3,9,4,8,6,7,7,6,4,8,3,4,7,3,4,4,1,0,6,1,1,0,0,7,6,4,6,9,8,4,3,9,3,8,6,5,4,7,8,9,7,1,3,8,8,2,5,6,2,1,6,3,5,0,9,0,6,4,5,9,2,3,2,8,2,9,3,7,0,4,1,9,2,0,4,0,8,2,3,8,1,4,2,3,4,3,4,1,5,4,0,1,7,0,8,4,0,8,6,5,6,9,2,0,2,4,2,9,8,8,2,8,9,8,9,2,9,9,7,8,3,7,3,2,1,7,2,3,0,4,1,5,6,5,5,0,2,8,3,0,3,8,9,4,7,9,6,8,2,4,8,4,6,6,1,4,5,8,2,3,5,1,8,9,6,5,2,8,3,7,5,3,1,9,7,5,3,3,2,0,3,0,6,1,1,5,0,7,1,4,5,7,8,1,8,5,9,3,1,9,7,0,4,0,8,1,7,5,7,0,7,8,6,1,3,9,1,2,2,8,4,3,5,0,1,4,7,9,9,1,1,3,4,3,4,0,1,3,8,9,6,3,6,6,3,6,2,4,0,1,0,9,8,1,0,8,4,3,4,6,5,6,0,7,2,5,0,2,2,8,5,9,1,2,1,2,8,6,6,1,0,7,9,1,5,7,9,8,7,1,7,3,8,0,3,0,6,6,3,6,4,7,0,1,2,9,2,1,6,9,4,2,9,1,8,0,7,3,1,3,9,8,5,4,7,0,5,1,5,9,8,0,7,0,7,8,7,4,1,5,1,1,1,5,1,3,3,6,1,2,8,1,4,0,6,6,4,1,2,7,2,6,7,4,1,7,7,7,7,9,3,2,2,7,1,2,6,4,9,1,5,2,1,6,7,5,7,3,5,2,8,8,7,1,5,6,0,1,6,2,2,2,3,1,2,9,0,2,3,0,2,1,8,0,9,2,8,5,5,9,0,9,5,6,0,9,8,9,2,7,1,5,4,3,2,1,3,9,3,7,9,6,6,0,0,8,2,9,9,1,2,7,1,4,9,6,2,1,9,6,7,2,2,8,2,0,1,3,8,7,8,2,2,2,0,0,8,7,2,2,2,5,4,0,0,8,2,2,0,6,5,5,3,6,4,3,8,6,2,3,8,6,3,8,9,8,3,9,9,4,9,3,9,7,8,5,0,9,2,6,2,3,9,5,4,2,3,4,2,1,5,6,6,2,5,0,9,2,3,8,6,2,0,4,9,2,3,0,2,1,4,6,1,2,0,1,3,0,4,3,8,7,1,9,6,5,3,8,5,3,4,5,1,5,0,3,4,8,0,5,5,5,0,1,4,6,9,5,8,8,7,4,4,6,8,3,6,2,3,5,3,4,4,0,3,2,7,9,8,1,0,3,7,5,5,5,4,3,1,3,5,7,9,9,6,1,1,1,3,4,5,7,5,6,9,5,7,9,0,5,4,4,6,5,7,7,4,5,1,8,9,6,9,9,6,3,8,7,8,2,0,2,3,6,7,2,5,5,4,0,4,6,6,0,4,8,3,0,0,3,7,6,4,7,2,2,4,0,9,3,6,7,4,6,9,3,0,1,6,5,3,8,5,9,6,3,5,1,7,5,8,0,4,5,7,8,7,2,3,7,6,4,2,7,3,1,0,6,9,1,2,7,5,2,6,6,8,9,7,3,4,9,9,7,6,2,1,3,9,0,6,8,7,7,2,5,5,0,3,3,2,8,1,2,0,5,6,9,0,3,4,7,3,9,2,5,8,1,1,0,7,5]

    Output:
    6
    Expected:
    4


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