import java.util.*;
public class Main {
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        int K = scan.nextInt();
        int S = scan.nextInt();
        int a;
        int b;
        int cnt = 0;
        for (a = 0; a <= K; a++) {
            int qw = K;
            if (S - a < qw) {
                qw = S-a;
                }for (b = 0; b <= qw; b++) {
                if (S - a - b <= K) cnt++;
                
            }
        }
        System.out.println(cnt);
    }
}
/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