1+1=3!!!!!!!!!!!!!!!

#include<iostream>
using namespace std;
int main()
{
	int z,t,m,num=0,u;
	cin>>z>>t;
	for(int i=1;i<=t;i++) 
	{
		u=(z+i-1)%7;
		if(u!=0 and u!=6) num+=250;
	}
	cout<<num;
}