Submission

Score: 100

User: TonnamSora

Problemset: มุมขวาบน

Language: cpp

Time: 0.002 second

Submitted On: 2025-10-08 00:21:47

#include <iostream>
using namespace std;

int main(){
    int N;
    cin >> N;
    int m = 1;
    int sum = 1;
    while(sum <= N){
        sum += (8 * m) - 2;
        m++;
    }
    sum = sum - ((8 * (m - 1)) - 2);
    int check = (8 * m) - 2 + sum;
    if(N == check - 2){
        cout << "Cannot find top-right corner.";
    }
    else{
        cout << sum;
    }
}