Submission

Score: 0

User: Sunsblad

Problemset: ตรวจบัตรเครดิต

Language: cpp

Time: 0.002 second

Submitted On: 2025-12-13 18:47:38

#include <iostream>
#include <vector>
#include <string>
using namespace std;
int main()
{
	string a;
	int sum = 0;
	vector<int> v(16);
	cin >> a;
	for(int i = 0; i < 16; i++)
	{
		v[i] = int(a[i]) - 48;
	}
	for (int i = 0; i < 16; i++)
	{
		if (i % 2 == 1)
		{
			v[i] *= 2;
		}
	}
	for (int i = 1; i<16; i++)
	{
		while(v[i] > 0)
		{
			sum += v[i] % 10;
			v[i] /= 10;

		}
	
	}
	sum = (10 - (sum % 10)) % 10;
	if(sum == v[0])
	{
		cout << "yes";
	}
	else
	{
		cout << "no";
	}
}