#include<iostream>
#define ll long long
using namespace std;
int main(){
	int x;
	ll n , s = 0;
	cin >> x >> n;
	for (ll i = 1 ; i <= n ; i ++){
		if (i == 6){
			i += 1;
			x = 1;
			continue;
		}
		else if (i == 7){
			i = 1;
			continue;
		}
		s += 250;
		x ++;
	}
	cout << s << endl;
	return 0;
}'''
哪里错了