AC gogogo

话不多说，上代码！！！
(保证AC)

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