import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		Scanner s = new Scanner(System.in);
		/*String a = s.next();
		String b = s.next();
		*/
		int a = s.nextInt();
		int b = s.nextInt();
		int c = s.nextInt();
		int x = s.nextInt();
		int count = 0;
		int amount = 0;

		for (int i = 0; i < a + 1; i++) {
			for (int j = 0; j < b + 1; j++) {
				for (int k = 0; k < c + 1; k++) {
					amount = 500 * i + 100 * j + 50 * k;
					if (x == amount) {
						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