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 <= k; x++) {
			for(int y = 0; y <= k; y++) {
				if(x + y <= s && x + y + k >= s) {
					count++;
				}
			}
		}
		System.out.println(count);
	}
} import java.util.Scanner; Scanner 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 count = 0;
		for(int x = 0; x <= k; x++) {
			for(int y = 0; y <= k; y++) {
				if(x + y <= s && x + y + k >= s) {
					count++;
				}
			}
		}
		System.out.println(count);
	}
} 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 <= k; x++) {
			for(int y = 0; y <= k; y++) {
				if(x + y <= s && x + y + k >= s) {
					count++;
				}
			}
		}
		System.out.println(count);
	} main {
		Scanner scan = new Scanner(System.in);
		int k = scan.nextInt();
		int s = scan.nextInt();
		int count = 0;
		for(int x = 0; x <= k; x++) {
			for(int y = 0; y <= k; y++) {
				if(x + y <= s && x + y + k >= s) {
					count++;
				}
			}
		}
		System.out.println(count);
	} Scanner scan = new Scanner(System.in); scan new Scanner(System.in) int k = scan.nextInt(); k scan.nextInt() scan.nextInt scan int s = scan.nextInt(); s scan.nextInt() scan.nextInt scan int count = 0; count 0 for(int x = 0; x <= k; x++) {
			for(int y = 0; y <= k; y++) {
				if(x + y <= s && x + y + k >= s) {
					count++;
				}
			}
		} int x = 0; int x = 0; x 0 x <= k x k x++ x++ x {
			for(int y = 0; y <= k; y++) {
				if(x + y <= s && x + y + k >= s) {
					count++;
				}
			}
		} {
			for(int y = 0; y <= k; y++) {
				if(x + y <= s && x + y + k >= s) {
					count++;
				}
			}
		} for(int y = 0; y <= k; y++) {
				if(x + y <= s && x + y + k >= s) {
					count++;
				}
			} int y = 0; int y = 0; y 0 y <= k y k y++ y++ y {
				if(x + y <= s && x + y + k >= s) {
					count++;
				}
			} {
				if(x + y <= s && x + y + k >= s) {
					count++;
				}
			} if(x + y <= s && x + y + k >= s) {
					count++;
				} x + y <= s && x + y + k >= s x + y <= s x + y x y s x + y + k >= s x + y + k x + y + k x y k s {
					count++;
				} count++ count System.out.println(count) System.out.println System.out System System.out count String[] args args 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 <= k; x++) {
			for(int y = 0; y <= k; y++) {
				if(x + y <= s && x + y + k >= s) {
					count++;
				}
			}
		}
		System.out.println(count);
	}
} 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 <= k; x++) {
			for(int y = 0; y <= k; y++) {
				if(x + y <= s && x + y + k >= s) {
					count++;
				}
			}
		}
		System.out.println(count);
	}
} Main
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 <= k; x++) {
			for(int y = 0; y <= k; y++) {
				if(x + y <= s && x + y + k >= s) {
					count++;
				}
			}
		}
		System.out.println(count);
	}
}