import java.util.*;

class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        String[] ks = scanner.nextLine().split(" ", 2);
        int k = Integer.parseInt(ks[0]);
        int s = Integer.parseInt(ks[1]);

        int count = 0;
        for (int x = 0; x <= Math.min(k, s); x++) {
            for (int y = 0; y <= Math.min(k, s - x); y++) {
                int z = s - x - y;
                if (0 <= z && z <= k) {
                    count++;
                }
            }
        }
        System.out.println(count);
    }
} import java.util.*; util.* java class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        String[] ks = scanner.nextLine().split(" ", 2);
        int k = Integer.parseInt(ks[0]);
        int s = Integer.parseInt(ks[1]);

        int count = 0;
        for (int x = 0; x <= Math.min(k, s); x++) {
            for (int y = 0; y <= Math.min(k, s - x); 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[] ks = scanner.nextLine().split(" ", 2);
        int k = Integer.parseInt(ks[0]);
        int s = Integer.parseInt(ks[1]);

        int count = 0;
        for (int x = 0; x <= Math.min(k, s); x++) {
            for (int y = 0; y <= Math.min(k, s - x); y++) {
                int z = s - x - y;
                if (0 <= z && z <= k) {
                    count++;
                }
            }
        }
        System.out.println(count);
    } main {
        Scanner scanner = new Scanner(System.in);
        String[] ks = scanner.nextLine().split(" ", 2);
        int k = Integer.parseInt(ks[0]);
        int s = Integer.parseInt(ks[1]);

        int count = 0;
        for (int x = 0; x <= Math.min(k, s); x++) {
            for (int y = 0; y <= Math.min(k, s - x); 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[] ks = scanner.nextLine().split(" ", 2); ks scanner.nextLine().split(" ", 2) scanner.nextLine().split scanner.nextLine() scanner.nextLine scanner " " 2 int k = Integer.parseInt(ks[0]); k Integer.parseInt(ks[0]) Integer.parseInt Integer ks[0] ks 0 int s = Integer.parseInt(ks[1]); s Integer.parseInt(ks[1]) Integer.parseInt Integer ks[1] ks 1 int count = 0; count 0 for (int x = 0; x <= Math.min(k, s); x++) {
            for (int y = 0; y <= Math.min(k, s - x); y++) {
                int z = s - x - y;
                if (0 <= z && z <= k) {
                    count++;
                }
            }
        } int x = 0; int x = 0; x 0 x <= Math.min(k, s) x Math.min(k, s) Math.min Math k s x++ x++ x {
            for (int y = 0; y <= Math.min(k, s - x); y++) {
                int z = s - x - y;
                if (0 <= z && z <= k) {
                    count++;
                }
            }
        } {
            for (int y = 0; y <= Math.min(k, s - x); y++) {
                int z = s - x - y;
                if (0 <= z && z <= k) {
                    count++;
                }
            }
        } for (int y = 0; y <= Math.min(k, s - x); y++) {
                int z = s - x - y;
                if (0 <= z && z <= k) {
                    count++;
                }
            } int y = 0; int y = 0; y 0 y <= Math.min(k, s - x) y Math.min(k, s - x) Math.min Math k s - x s x 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++ count System.out.println(count) System.out.println System.out System System.out count String[] args args
import java.util.*;

class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        String[] ks = scanner.nextLine().split(" ", 2);
        int k = Integer.parseInt(ks[0]);
        int s = Integer.parseInt(ks[1]);

        int count = 0;
        for (int x = 0; x <= Math.min(k, s); x++) {
            for (int y = 0; y <= Math.min(k, s - x); y++) {
                int z = s - x - y;
                if (0 <= z && z <= k) {
                    count++;
                }
            }
        }
        System.out.println(count);
    }
}
