import java.util.Scanner;

public class Main {
    public static void main(String[] args) {

        Scanner scanner = new Scanner(System.in);
        String[] line = scanner.nextLine().split(" ");

        int k = Integer.parseInt(line[0]);
        int s = Integer.parseInt(line[1]);

        int count = 0;
        for (int x = 0; x <= k; x++) {
            for (int y = 0; y <= k; y++) {
                int z = s - x - y;
                if (0 <= z && z <= k) count++;
            }
        }

        System.out.println(count);
    }

}
 import java.util.Scanner; Scanner java.util public class Main {
    public static void main(String[] args) {

        Scanner scanner = new Scanner(System.in);
        String[] line = scanner.nextLine().split(" ");

        int k = Integer.parseInt(line[0]);
        int s = Integer.parseInt(line[1]);

        int count = 0;
        for (int x = 0; x <= k; x++) {
            for (int y = 0; y <= k; y++) {
                int z = s - x - y;
                if (0 <= z && z <= k) count++;
            }
        }

        System.out.println(count);
    }

} Main public static void main(String[] args) {

        Scanner scanner = new Scanner(System.in);
        String[] line = scanner.nextLine().split(" ");

        int k = Integer.parseInt(line[0]);
        int s = Integer.parseInt(line[1]);

        int count = 0;
        for (int x = 0; x <= k; x++) {
            for (int y = 0; y <= k; y++) {
                int z = s - x - y;
                if (0 <= z && z <= k) count++;
            }
        }

        System.out.println(count);
    } main {

        Scanner scanner = new Scanner(System.in);
        String[] line = scanner.nextLine().split(" ");

        int k = Integer.parseInt(line[0]);
        int s = Integer.parseInt(line[1]);

        int count = 0;
        for (int x = 0; x <= k; x++) {
            for (int y = 0; y <= k; y++) {
                int z = s - x - y;
                if (0 <= z && z <= k) count++;
            }
        }

        System.out.println(count);
    } Scanner scanner = new Scanner(System.in); scanner new Scanner(System.in) String[] line = scanner.nextLine().split(" "); line scanner.nextLine().split(" ") scanner.nextLine().split scanner.nextLine() scanner.nextLine scanner " " int k = Integer.parseInt(line[0]); k Integer.parseInt(line[0]) Integer.parseInt Integer line[0] line 0 int s = Integer.parseInt(line[1]); s Integer.parseInt(line[1]) Integer.parseInt Integer line[1] line 1 int count = 0; count 0 for (int x = 0; x <= k; x++) {
            for (int y = 0; y <= k; y++) {
                int z = s - x - y;
                if (0 <= z && z <= k) count++;
            }
        } int x = 0; int x = 0; x 0 x <= k x k x++ x++ x {
            for (int y = 0; y <= k; y++) {
                int z = s - x - y;
                if (0 <= z && z <= k) count++;
            }
        } {
            for (int y = 0; y <= k; y++) {
                int z = s - x - y;
                if (0 <= z && z <= k) count++;
            }
        } for (int y = 0; y <= k; y++) {
                int z = s - x - y;
                if (0 <= z && z <= k) count++;
            } int y = 0; int y = 0; y 0 y <= k y k y++ y++ y {
                int z = s - x - y;
                if (0 <= z && z <= k) count++;
            } {
                int z = s - x - y;
                if (0 <= z && z <= k) count++;
            } int z = s - x - y; z s - x - y s - x - y s x y if (0 <= z && z <= k) count++; 0 <= z && z <= k 0 <= z 0 z z <= k z k 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 scanner = new Scanner(System.in);
        String[] line = scanner.nextLine().split(" ");

        int k = Integer.parseInt(line[0]);
        int s = Integer.parseInt(line[1]);

        int count = 0;
        for (int x = 0; x <= k; x++) {
            for (int y = 0; y <= k; y++) {
                int z = s - x - y;
                if (0 <= z && z <= k) count++;
            }
        }

        System.out.println(count);
    }

} public class Main {
    public static void main(String[] args) {

        Scanner scanner = new Scanner(System.in);
        String[] line = scanner.nextLine().split(" ");

        int k = Integer.parseInt(line[0]);
        int s = Integer.parseInt(line[1]);

        int count = 0;
        for (int x = 0; x <= k; x++) {
            for (int y = 0; y <= k; y++) {
                int z = s - x - y;
                if (0 <= z && z <= k) count++;
            }
        }

        System.out.println(count);
    }

} Main
import java.util.Scanner;

public class Main {
    public static void main(String[] args) {

        Scanner scanner = new Scanner(System.in);
        String[] line = scanner.nextLine().split(" ");

        int k = Integer.parseInt(line[0]);
        int s = Integer.parseInt(line[1]);

        int count = 0;
        for (int x = 0; x <= k; x++) {
            for (int y = 0; y <= k; y++) {
                int z = s - x - y;
                if (0 <= z && z <= k) count++;
            }
        }

        System.out.println(count);
    }

}

