import java.util.*;

public class Main {
    public static void main(String... args) {
        Scanner sc = new Scanner(System.in);
        int A = sc.nextInt();
        int B = sc.nextInt();
        int C = sc.nextInt();
        int X = sc.nextInt();
        sc.close();

        int ans = 0;
        for (int i = 0; i <= A; i++) {
            for (int j = 0; j <= B; j++) {
                for (int k = 0; k <= C; k++) {
                    if (X == 500 * i + 100 * j + 50 * k)
                        ans++;
                }
            }
        }
        System.out.println(ans);
    }
}
/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