import java.util.Scanner;

public class Main{
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        int K = Integer.parseInt(sc.next());
        int S = Integer.parseInt(sc.next());
        int count = 0;
        for(int x=0; x <= K &&  x <= S; x++){
            for(int y=0; y <= K && y <= S; y++){
                if((x + y) <= S &&  S - (x + y) <= K){
                    count++;
                }
            }
        }
        System.out.print(count);
    }
}
/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz