#include <bits/stdc++.h>
using namespace std;
 
#define ll long long
#define ull unsigned long long
#define ld long double
 
void Free_palestine() {
    ios::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);
}
 
const int N = 2e5 + 5;
const int MOD = 1e9 + 7;
const int MAXN = 1e5 + 5;


signed main(){
  Free_palestine();
  int n,m; cin>>n>>m;
  
  int cnt=0;
  for(int x =0; x<=n ; x++){
  	for(int y =0; y<=n ; y++){
  		int z = m-x-y;
  		if(z >= 0 && z <= n){
  			cnt++;
  		}
  	}
  }
  	 cout<<cnt<<endl;
}