Submission

Score: 100

User: ultraman9845

Problemset: ตรวจบัตรเครดิต

Language: cpp

Time: 0.005 second

Submitted On: 2026-10-11 22:09:15

#include<iostream>

#include<cstring>

typedef long long ll;

using namespace std;

int main()
{
	string a;
	cin >> a ;
	ll sum = 0 ;
	for(int i = 0; i < 16 - 1; i++)
	{
		ll val = (a[i] - '0');
		if(i % 2 == 0)
		{
			val *= 2;
		}
		sum += val % 10 + val / 10;
	}
	if((10 - sum % 10) % 10 == a.back() - '0' )
	{
		cout << "yes" ;
	}
	else
	cout << "no" ;
	
	return 0;
	
}