简单

#include<bits/stdc++.h>
using namespace std;
int main(){
	int x,n,s=0;
    cin>>x>>n;
    for (int i=1;i<=n;i++){
    	if (x!=6 and x!=7) s+=250;
        if(x<=6) x++;
        else x=1;
    }
    cout<<s;
	return 0;
}