CF Z contest

#include <bits/stdc++.h>
using namespace std;
#define test int t; cin>>t; while (t--)
#define ll long long int
#define fellow_junior  ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
int main()
{
   fellow_junior

   ll a,c,d=0,e,f,i,j,k,l;
   cin>>a>>c;
   for(i=0;i<=a;i++)
   {
       for(j=0;j<=a;j++)
       {
           e=c-i-j;
           if(e>=0 && e<=a && i+j+e==c)
           {
               d++;
           }
       }
   }
   cout<<d<<endl;
   return 0;
}