Submission

Score: 0

User: Bestzu

Problemset: เลขดวง

Language: cpp

Time: 0.002 second

Submitted On: 2025-10-15 11:01:35

#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);
	int topright2 = (i+2)*(i+2) - (i+1);
//	cout << "topright2 = " << topright2 << endl;
	if(n+2 == topright2) {
		cout << "Cannot find top-right corner.";
	}
	else {
    	cout << topright << endl;	
	}
   

    return 0;
}