import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int A = Integer.parseInt(sc.next());
		int B = Integer.parseInt(sc.next());
		int C = Integer.parseInt(sc.next());
		int X = Integer.parseInt(sc.next());
		sc.close();

		int count = 0;
		for(int a = 0; a <= A; a++) {
			for(int b = 0; b <= B; b++) {
				for(int c = 0; c <= C; c++) {

					int check = 500 * a + 100 * b + 50 * c;
					if(check == 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