题解

#include <bits/stdc++.h>
using namespace std;
int x=0,n=0,sum=0;
int main()
{
	cin>>x>>n;
	while(n)
	{
		
		if(x%7!=6 and x%7!=0) sum+=250;
		x++;
		n--;
		
	}
	cout<<sum;
	
    return 0;
}