import java.util.*;
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 result = 0;
		for (int x = 0; x <= K; x++) {
			for (int y = 0; y <= K; y++) {
				int total = x + y;
				if (!(total > S) && (total+K) >= S) {
					result++;
				}
			}
		}
		System.out.println(result);
	}
}
/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