Submission

Score: 100

User: NovemNotes

Problemset: นักบินอวกาศ

Language: cpp

Time: 0.003 second

Submitted On: 2025-09-28 15:44:51

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

const int N = 203;

int ans[N],pl[N];

int main(){
    ios_base::sync_with_stdio(false);cin.tie(NULL);
    int n;cin >> n;
    pl[1]=ans[1]=4;
    for(int i=2;i<=n;i++){
        pl[i]=pl[i-1]+6;
        ans[i]=ans[i-1]+pl[i];
    }
    cout << ans[n] << "\n";
    return 0;
}