Submission

Score: 100

User: kakcode

Problemset: นักบินอวกาศ

Language: cpp

Time: 0.003 second

Submitted On: 2025-11-12 21:54:59

/*
TASK: c1_bkk67_3
LANG: C++
AUTHOR: ICE
*/
#include <bits/stdc++.h>
using ll = long long;
#define forr(i, a, n) for (int i = a; i < n; i++)
const ll inf = 10e9;
#define int ll
using namespace std;
using pii = pair<int,int>;
int times[1000];
signed main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    int t;
    cin >> t;
    int a = 4;
    for(int i=1;i<1000;i++){
        times[i] = a + times[i-1];
        a += 6;
    }
    cout << times[t];
    return 0;
}