Submission

PPPPPPPPPP

Score: 100

User: Jibhong

Problemset: โชว์ของโลมา

Language: cpp

Time: 0.002 second

Submitted On: 2025-03-23 13:58:34

#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){
//         cout<<(last+4)<<' '<<(last+3)<<'\n';
        return (last+4)%10+(last+3)%10;
    }
//     cout<<(3*n-2+last)<<' '<<(3*n-1+last)<<'\n';
    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;
}