Submission

Score: 100

User: SpeedGai

Problemset: ตรวจบัตรเครดิต

Language: cpp

Time: 0.005 second

Submitted On: 2026-10-15 14:59:21

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

int main(){
    string s;
    int sum = 0;
    cin >> s;
    vector<int>num;

    for(int i = 0; i < 16; i++){
        num.push_back(s[i] - '0');

    }


    for(int i = 0; i < 15; i++){
        if(i % 2 == 0){
            num[i] *= 2;
            if(num[i] >= 10){
                num[i] = (num[i] / 10) + (num[i] % 10);
            }
        
            
        }
        sum += num[i];
    }

    if((10 - (sum % 10)) % 10 == s[15] - '0'){
        cout << "yes"; return 0;
    }
    else cout << "no";
    return 0;
}