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