Submission

Score: 100

User: sulinx

Problemset: ตรวจบัตรเครดิต

Language: cpp

Time: 0.002 second

Submitted On: 2025-10-24 18:40:44

#include <bits/stdc++.h>

using namespace std;

int main(){
    string str;
    cin >> str;

    int cred[16];
    for(int i = 0;i<16;i++){
        cred[i] = str[i] - 48;
    }

    int R = 0;
    for(int i = 0;i<15;i++){
        if(i%2==0){
            cred[i] *= 2;
        }

        if(cred[i]<10){
            R+=cred[i];
        }else{
            R+=cred[i]/10 + cred[i]%10;
        }
    }

    if((10-(R%10))%10 == cred[15]){
        cout << "yes";
    }else{
        cout << "no";
    }
}