import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        int k = scan.nextInt();
        int s = scan.nextInt();

        int count = 0;

        for(int x = 0; x <=  s; x++) {
            if(x <= k) {
                for(int y = 0; y <= s - x; y++) {
                    if (y <= k && s - x - y <= k){
                        count += 1;
                    }
                }
            }
        }
        System.out.println(String.valueOf(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