Submission

Score: 100

User: lupniexx

Problemset: ตรวจบัตรเครดิต

Language: cpp

Time: 0.002 second

Submitted On: 2025-11-04 10:53:28

#include<bits/stdc++.h>
using namespace std;
int main(){
    string s;
    int n[16];
    int r=0;
    cin >> s;
    int len = s.length();
    for(int i=0;i<len;i++){
        n[i]=s[i]-48;
    }
    for(int i = 0; i < 15; i++) {
        if(i % 2 == 0) { 
            n[i] *= 2;
        if(n[i] > 9) {n[i] -= 9;}
        }
        r += n[i];
    }
    if((10-(r%10))%10==n[len-1]){cout<<"yes";}
    else {cout << "no";}
}