import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int k = sc.nextInt();
        int s = sc.nextInt();
        sc.close();

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

        int count = 0;
        for(int x=0; x<=k; x++) {
            for(int y=0; y<=k; y++) {
                if(s-(x+y) >= 0 && s-(x+y) <= k) {
                    if(x+y+(s-(x+y)) == s) {
                        count++;
                    }
                }
            }
        }
        System.out.println(count);
    }
} Main public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int k = sc.nextInt();
        int s = sc.nextInt();
        sc.close();

        int count = 0;
        for(int x=0; x<=k; x++) {
            for(int y=0; y<=k; y++) {
                if(s-(x+y) >= 0 && s-(x+y) <= k) {
                    if(x+y+(s-(x+y)) == s) {
                        count++;
                    }
                }
            }
        }
        System.out.println(count);
    } main {
        Scanner sc = new Scanner(System.in);
        int k = sc.nextInt();
        int s = sc.nextInt();
        sc.close();

        int count = 0;
        for(int x=0; x<=k; x++) {
            for(int y=0; y<=k; y++) {
                if(s-(x+y) >= 0 && s-(x+y) <= k) {
                    if(x+y+(s-(x+y)) == s) {
                        count++;
                    }
                }
            }
        }
        System.out.println(count);
    } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int k = sc.nextInt(); k sc.nextInt() sc.nextInt sc int s = sc.nextInt(); s sc.nextInt() sc.nextInt sc sc.close() sc.close sc int count = 0; count 0 for(int x=0; x<=k; x++) {
            for(int y=0; y<=k; y++) {
                if(s-(x+y) >= 0 && s-(x+y) <= k) {
                    if(x+y+(s-(x+y)) == 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(s-(x+y) >= 0 && s-(x+y) <= k) {
                    if(x+y+(s-(x+y)) == s) {
                        count++;
                    }
                }
            }
        } {
            for(int y=0; y<=k; y++) {
                if(s-(x+y) >= 0 && s-(x+y) <= k) {
                    if(x+y+(s-(x+y)) == s) {
                        count++;
                    }
                }
            }
        } for(int y=0; y<=k; y++) {
                if(s-(x+y) >= 0 && s-(x+y) <= k) {
                    if(x+y+(s-(x+y)) == s) {
                        count++;
                    }
                }
            } int y=0; int y=0; y 0 y<=k y k y++ y++ y {
                if(s-(x+y) >= 0 && s-(x+y) <= k) {
                    if(x+y+(s-(x+y)) == s) {
                        count++;
                    }
                }
            } {
                if(s-(x+y) >= 0 && s-(x+y) <= k) {
                    if(x+y+(s-(x+y)) == s) {
                        count++;
                    }
                }
            } if(s-(x+y) >= 0 && s-(x+y) <= k) {
                    if(x+y+(s-(x+y)) == s) {
                        count++;
                    }
                } s-(x+y) >= 0 && s-(x+y) <= k s-(x+y) >= 0 s-(x+y) s (x+y) x y 0 s-(x+y) <= k s-(x+y) s (x+y) x y k {
                    if(x+y+(s-(x+y)) == s) {
                        count++;
                    }
                } if(x+y+(s-(x+y)) == s) {
                        count++;
                    } x+y+(s-(x+y)) == s x+y+(s-(x+y)) x+y+(s-(x+y)) x y (s-(x+y)) s (x+y) x y 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 sc = new Scanner(System.in);
        int k = sc.nextInt();
        int s = sc.nextInt();
        sc.close();

        int count = 0;
        for(int x=0; x<=k; x++) {
            for(int y=0; y<=k; y++) {
                if(s-(x+y) >= 0 && s-(x+y) <= k) {
                    if(x+y+(s-(x+y)) == s) {
                        count++;
                    }
                }
            }
        }
        System.out.println(count);
    }
} public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int k = sc.nextInt();
        int s = sc.nextInt();
        sc.close();

        int count = 0;
        for(int x=0; x<=k; x++) {
            for(int y=0; y<=k; y++) {
                if(s-(x+y) >= 0 && s-(x+y) <= k) {
                    if(x+y+(s-(x+y)) == s) {
                        count++;
                    }
                }
            }
        }
        System.out.println(count);
    }
} Main
import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int k = sc.nextInt();
        int s = sc.nextInt();
        sc.close();

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