不用循环

#include<bits/stdc++.h>
using namespace std;
int main(){
int a,b,c,n,x,sum=0;
cin>>x>>n;
a = n + x - 1;
b = a / 7;
c = a % 7;

if(c == 7 || c == 6){
   c = 5;
}
if(x == 6 || x == 7){
    x = 6;
}
sum = ((b - 1) * 5 + c + (5 - x + 1)) * 250;
cout << sum;
return 0;

}