import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        @SuppressWarnings("resource")
        Scanner sc = new Scanner(System.in);
        int a = sc.nextInt();
        int b = sc.nextInt();
        int c = sc.nextInt();
        int x = sc.nextInt();
        int count = 0;
        for (int i = 0 ; i <= a ; i++) {
            for (int j = 0 ; j <= b ; j++) {
                for (int k = 0 ; k <= c ; k++) {
                    if (500 * i + 100 * j + 50 * k == x) {
                        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