Submission

Score: 100

User: PEPSEALSEA

Problemset: บาร์โค้ด

Language: cpp

Time: 0.003 second

Submitted On: 2026-09-26 22:05:49

#include <iostream>
#include <string>

using namespace std;

int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);

    string barcode;
    if (!(cin >> barcode) || barcode.length() != 13) {
        cout << "NO\n";
        return 0;
    }

    int checkdigit = barcode[12] - '0';

    int sum_even = 0;
    int sum_odd = 0;

    for (int pos = 2; pos <= 13; pos++) {
        int digit = barcode[13 - pos] - '0';
        if (pos % 2 == 0) {
            sum_even += digit;
        } else {
            sum_odd += digit;
        }
    }

    int total_sum = (sum_even * 3) + sum_odd + checkdigit;

    if (total_sum % 10 == 0) {
        cout << "YES\n";
    } else {
        cout << "NO\n";
    }

    return 0;
}