You are given two integers K and S.
Three variable X, Y and Z takes integer values satisfying 0≤X,Y,Z≤K.
How many different assignments of values to X, Y and Z are there such that X + Y + Z = S?

Constraints

* 2≤K≤2500
* 0≤S≤3K
* K and S are integers.

Input

The input is given from Standard Input in the following format:


K S


Output

Print the number of the triples of X, Y and Z that satisfy the condition.

Examples

Input

2 2


Output

6


Input

5 15


Output

1
#include<bits/stdc++.h>
using namespace std;
int k,s,cnt;
int main(){
    cin>>k>>s;
    for(int x=0;x<=k;x++)    for(int y=0;y<=k;y++)    if(s>=x+y&&s-x-y<=k) cnt++;
    cout<<cnt<<endl;
}