Submission

Score: 0

User: DIce

Problemset: สตริงซ้ำซ้ำ

Language: cpp

Time: 0.004 second

Submitted On: 2026-10-02 21:22:20

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

ll arr[1005];

int main(){

    ll n;
    cin>>n;

    arr[1] = 4;
    for(int i=2;i<=n;i+=1){
        arr[i]=arr[i-1]+4+6*(i-1);
    }
    cout<<arr[n];

}