Submission

Status:

PPPPPPPPPPPPPPPPPPPP

Score: 100

User: Namkhing

Problemset: มุมขวาบน

Language: cpp

Time: 0.002 second

Submitted On: 2025-04-11 16:33:10

#include <bits/stdc++.h>
using namespace std;

using ll = long long;

int main() {
    cin.tie(nullptr)->ios_base::sync_with_stdio(false);
    ll n;
    cin >> n;
    ll now = 1;
    ll ans = 1;
    while (true) {
        ll add = now * 4 + 2;
        if (ans + add > n) break;
        ans += add;
        now += 2;
    }
    if (n == ans + now * 4) cout << "Cannot find top-right corner.";
    else if (n == ans + now * 4 + 1) cout << ans + now * 4 + 1;
    else cout << ans;
}