题解

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