Submission

Score: 100

User: APNICHANAN

Problemset: ตรวจบัตรเครดิต

Language: cpp

Time: 0.002 second

Submitted On: 2025-10-05 18:16:00

#include <iostream>
using namespace std;
int main()
{
    string n;
    int r[15], sum = 0;
    cin >> n;
    int check = n[15] - 48;
    for (int i = 14; i >= 0; i--)
    {
        r[14 - i] = n[i] - '0';
        if ((14 - i) % 2 == 0)
            r[14 - i] *= 2;
        if (r[14 - i] >= 10)
        {
            sum += (r[14 - i] / 10) + (r[14 - i] % 10);
        }
        else
            sum += r[14 - i];
    }
    if ((10 - (sum % 10)) % 10 == check)
        cout << "yes";
    else
        cout << "no";
}