Submission

Status:

PPPPPPPPPP

Score: 100

User: Jibhong

Problemset: โชว์ของโลมา

Language: cpp

Time: 0.002 second

Submitted On: 2025-03-23 14:01:03

#include <bits/stdc++.h>
using namespace std;
#define ll long long
ll solve(ll n,ll last){
    if(n==1)return (last+1)%10;
    if(n==2)return (last+4)%10+(last+3)%10;
    return solve(n-2,4*n-4+last)+(3*n-2+last)%10+(3*n-1+last)%10;
}
int main(){
    ll n;
    cin>>n;
    cout<<solve(n,0);
    return 0;
}