Submission

Score: 0

User: mik

Problemset: สตริงซ้ำซ้ำ

Language: cpp

Time: 0.002 second

Submitted On: 2026-10-11 08:54:52

#include <bits/stdc++.h>

using namespace std;

int main(){
    ios_base::sync_with_stdio(false),cin.tie(NULL);
    int s,sum=4;
    cin >> s;
    if (s==0) cout << 0;
    if (s==1) cout << 1;
    int  e = 6;
    for (int i=0;i<s-1;i++){
        sum += 4;
        sum += e;
        e += 6;
    }
    cout << sum;
    return 0;
}