Submission

Score: 60

User: fillhavertz

Problemset: โชว์ของโลมา

Language: cpp

Time: 0.002 second

Submitted On: 2025-10-13 23:40:31

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

int main(){
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    
    int n;
    
    
    cin>>n;
    int j=n;
    int sum=0;
    int temp,pluss,time;
    time = 3*(n-1)+1;
    for(int i=0;i<n;i++){
        if(n==1) {sum=1; break;}
        else if(i==n-1) {if(n%2!=0) ++time; else  --time;}
        else if(i%2) {++time;}
        else {time+=pluss;}
        pluss = j*4-7;
        j--;
        //cout<<time<<' ';
        sum+=time%10;
    }cout<<sum;

    
}