import java.util.Scanner;
public class Main {
    public static void main(String[] args) throws Exception {
        // Your code here!
        int x,y,z,k,s,count=0;
        Scanner scan = new Scanner(System.in);
        k = scan.nextInt();
        s = scan.nextInt();
        if(s / k == 3){
            count++;
        }else{
            for(x = 0; x <= k; x++){
                for(y = 0;y<=k;y++){
                    if(s - x-y >=0 && s -x-y <=k) count++;
                }
             }
        }
        
        System.out.println(count);
    }
}
/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz