import java.util.Scanner;
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();
		int ans = 0;

		for(int i = 0; i <= A; i++) {
			if(500 * i > X) {
				break;
			}
			for(int j = 0; j <= B; j++) {
				for(int k = 0; k <= C; k++) {
					if(500 * i + 100 * j + 50 * k == X) {
						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