
import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner scanner = new Scanner(System.in);
		Integer output = 0;

		Integer kInteger = new Integer(scanner.next());
		Integer sInteger = new Integer(scanner.next());

		for(int x = 0;x<=kInteger;x++) {
			for(int y = 0;y<=kInteger;y++) {
			if(kInteger>=(sInteger - x-y) && 0<=(sInteger - x-y))
				output++;
			}
		}
		System.out.println(output);
		scanner.close();
	}
}

/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