Submission

Score: 100

User: Angpao

Problemset: ตรวจบัตรเครดิต

Language: cpp

Time: 0.003 second

Submitted On: 2025-09-28 21:08:59

#include <bits/stdc++.h>

using namespace std;
int main()
{
    int sum=0;
    string s;
    cin>>s;
    char c=s.back();
    s.pop_back();
    int arr[s.size()];
    reverse(s.begin(),s.end());
    for(int i=0;i<s.size();i++){
        if((i+1)%2!=0){
            arr[i]=(s[i]-'0')*2;
        }else{
            arr[i]=s[i]-'0';
        }

    }
    for(int i=0;i<s.size();i++){
        if(arr[i]>=10){
            arr[i]=1+arr[i]%10;
        }
        sum+=arr[i];
    }

    if((10-(sum%10))%10==c-'0'){
        cout<<"yes";
    }else{
        cout<<"no";
    }
}