Submission

PPPPPP----

Score: 60

User: Nakornrat

Problemset: โชว์ของโลมา

Language: cpp

Time: 0.003 second

Submitted On: 2025-03-16 17:11:27

#include <bits/stdc++.h>
using namespace std;
#define endl '\n'
int a=-1, b=0, c=-2;
int main()
{
    ios::sync_with_stdio(false);cin.tie(0);
    int n;cin>>n;
    int t = 1;
    vector<int>num;
    int idx = 0;
    while(idx<n){
        t = t+(n+a)+n+b+n+c;
        num.push_back(t);
        ++idx;
        if(idx == n-1){
            num.push_back(t-1);
            ++idx;
        }
        else if(idx<n){
            num.push_back(t+1);
            ++idx;
        }
        if(idx==2)a=0;
        t = t+n+c;
        a = a-2;
        b = b-2;
        c = c-2;
    }
    int sum = 0;
    for(int x:num)sum+=x%10;
    cout<<sum;
}