Submission

Score: 100

User: Some1258

Problemset: ตรวจบัตรเครดิต

Language: cpp

Time: 0.002 second

Submitted On: 2026-05-03 09:55:20

#include <iostream>
using namespace std;

int main() {
    string s;
    int down[16];

    cin >> s;

    for (int i = 0; i < 16; i++) {
        down[15 - i] = s[i] - '0';
    }

    int sum = 0;

    for (int i = 1; i < 16; i++) {
        int digit = down[i];

        if (i % 2 == 1) {
            digit *= 2;
        }

        sum += digit / 10 + digit % 10;
    }

    int check = (10 - (sum % 10)) % 10;

    if (check == down[0]) {
        cout << "yes";
    } else {
        cout << "no";
    }
}