#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 a,x,s=0; cin>>x>>a; for(int i=1;i<=a;i++){ if(x<6) s=s+250; x++; if(x>7) x=1; } cout<<s; return 0; }