#include<iostream> // cin\cout\endl #include<cstdio> //scanf()\printf() #include<cstring> // strcpy()\strcat()\strcmp()\strlen()\memset() #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<=5) s+=250; x++; if(x>7) x=1; } cout<<s; return 0; }