Submission

Score: 100

User: mumumimi

Problemset: มุมขวาบน

Language: cpp

Time: 0.004 second

Submitted On: 2026-10-05 02:13:04

#include <bits/stdc++.h>
using namespace std;
#define ll long long
int main(){
    ll n;cin >> n;
    ll total=1;
    int i=1;
    while(true){
        total=total+(8*i-2);
        if(total>n){
            if(total-n==2){
                cout << "Cannot find top-right corner.";
            }
            total = total-(8*i-2);
            cout << total ;
            break;
        }else if(total==n){
            cout << total ;
            break;
        }
        i++;
    }
}