import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int a = Integer.parseInt(scanner.nextLine()); // 500
        int b = Integer.parseInt(scanner.nextLine()); // 100
        int c = Integer.parseInt(scanner.nextLine()); //  50
        int x = Integer.parseInt(scanner.nextLine());

        int answer = 0;
        for (int i = 0; i <= a; i++) {
            for (int j = 0; j <= b; j++) {
                for (int k = 0; k <= c; k++) {
                    if (i * 500 + j * 100 + k * 50 == x) {
                        answer++;
                    }
                }
            }
        }

        System.out.println(answer);
        scanner.close();
    }
}

/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