Submission

Score: 75

User: Bestzu

Problemset: มุมขวาบน

Language: cpp

Time: 0.002 second

Submitted On: 2025-10-15 10:07:18

#include <bits/stdc++.h>
#define endl '\n'
using namespace std;

int main() {
    ios::sync_with_stdio(false); cin.tie(0);

    int n; cin >> n;
    int i = sqrt(n);
    if(i % 2 == 0) i--;
    int topright = i*i - (i-1);
    cout << topright;
    return 0;
}