Submission

Score: 100

User: randomguy

Problemset: ตรวจบัตรเครดิต

Language: cpp

Time: 0.003 second

Submitted On: 2025-10-10 13:44:52

#include <iostream>
#include <bits/stdc++.h>
#include <string>
#include <numeric>
#include <set>
#include <algorithm>
#define io() do { ios::sync_with_stdio(false); cin.tie(nullptr); } while(0)
using namespace std;



int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    string a;
    cin >> a;
    char ln = a[a.size()-1];
    string b(a.rbegin()+1,a.rend());
    string c="";
    for(int i=0;i<b.size();i++){
        if((i+1)%2){
            c+= to_string((b[i]-'0')*2);
        }
        else c+= b[i];
    }
    int s=0;
    for(int i=0;i<c.size();i++){
        s+=c[i]-'0';
    }
    if(ln-'0'==(10-(s%10))%10) cout << "yes";
    else cout << "no";
}