Submission

Score: 100

User: chillxvtkz

Problemset: ตรวจบัตรเครดิต

Language: cpp

Time: 0.004 second

Submitted On: 2026-10-10 09:12:00

#include <bits/stdc++.h>
#define ll long long
#define ct cout << ' '
#define el cout << endl;
using namespace std;
const int mx = 1e9;
const int mn = -1e9;

int sum,t,g;
string s;
int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cin >> s;
    string y=s;
    y.pop_back();
    reverse(y.begin(),y.end());
    for (int i = 0; i < 15; i=i+2)
    {
        t = (s[i]-'0') * 2;
        if(t==10) sum = sum+1;
        else if(t==11) sum = sum+1+1;
        else if(t==12) sum = sum+1+2;
        else if(t==13) sum = sum+1+3;
        else if(t==14) sum = sum+1+4;
        else if(t==15) sum = sum+1+5;
        else if(t==16) sum = sum+1+6;
        else if(t==17) sum = sum+1+7;
        else if(t==18) sum = sum+1+8;
        else sum = sum+t;
    }
    for (int i = 1; i < 15; i=i+2)
    {
        sum = sum+(s[i]-'0');
    }
    g = (10-(sum%10))%10;
    if(g==(s[15]-'0'))cout << "yes";
    else cout << "no";
    
    return 0;
}