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