#include<iostream>


using namespace std;
int main()
{
	int x;long n,sum=0;
	
	cin >> x >> n;
	for (long  i = 1; i <= n; i++)
	{
		if (x == 6 || x == 7)
			continue;
		sum += 250;
		x = (x  % 7)+1;
		
		
	}

	cout<<sum;
	return 0;
}