40分求助：

#include <iostream>
using namespace std;
int main() 
{
	long long m, n, k, s = 0, t;
	cin >> m >> k;
	n = m;
	while (n)
	{
		t = n % 10;
		if(t == 3)
		{
			s++;
		}
		n /= 10;
	}
	if (m % 19 == 0 && s == k)
	{
		cout << "YES" << endl;
	}
	else
	{
		cout << "NO" << endl;
	}
    return 0;
}