#include<bits/stdc++.h>
using namespace std;
int main(){
	int i,n,x,s=0;
	cin>>x>>n;
	for(i=0;i<=n;i++){
		if(((x+i)%6==0)||((x+i)%7==0)){
			s+=0;
		}
		else{
			s+=250;
		}
	} 
	cout<<s;
	return 0;
}

/**************************************************************
	Problem: 1468
	User: houshanglin
	Language: C++
	Result: Wrong Answer
****************************************************************/