#include<bits/stdc++.h> using namespace std; int main() { int x, n; cin >> x >> n; int count1 = 0; int count2 = 0; for (int i = 0; i < n; i++) { if((x+i)%7==6||(x+i)%7==0){ count2++; }else{ count++; } } cout<<count1*250; return 0; }