Submission

Score: 100

User: new2

Problemset: ตรวจบัตรเครดิต

Language: cpp

Time: 0.002 second

Submitted On: 2025-12-18 18:28:35

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

int main(){
    string n;
    cin >> n;
    int last = n[15] - '0';
    int ans = 0;
    for (int i = 0; i <= 14; i++){
        int t = n[i] - '0';
        if (i % 2 == 0) {
            t *= 2;
            if (t >= 10) {
                ans += (t/10) + (t%10);
            }
            else ans += t;
        }
        else ans += t;
    }
    if (((10-(ans%10))%10) == last) cout << "yes";
    else cout << "no";
}