#include<bits/stdc++.h> #define int long long using namespace std; int t,s,a; signed main(){ cin>>t>>s; for(int i=0;i<=t;i++){ for(int j=0;j<=t;j++){ int k=s-i-j; if(i+j+k==s&&i<=t&&j<=t&&k<=t&&k>=0) a++; } } cout<<a; return 0; }