#include<iostream> #include<cstdio> //scanf()\printf() #include<cstring> #include<cmath> //sqrt()\pow()\abs()\ceil()\floor()\max()\min() using namespace std; int main(){ int x,n,s=0; cin>>x>>n; for(int i=1;i<=n;i++){ if(x>7) x=1; if(x<6) s+=250; x++; } cout<<s; return 0; }