import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        int K = scan.nextInt(), S = scan.nextInt();
        int x, y, cnt = 0;

        for (x=0; x <= K; x++) {
            int ylim = K;
            if (S-x < ylim) ylim = S-x;

            for (y=0; y <= ylim; y++) {
                if (S - x - y <= 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