import java.util.*;

public class Main {

	public static void main(String[] args) {


		int A = 0;
		int B = 0;
		int C = 0;
		int X = 0;
		int difference = 0;
		int judge = 0;
		Scanner scanner = new Scanner(System.in);

		A = scanner.nextInt();
		B = scanner.nextInt();
		C = scanner.nextInt();
		X = scanner.nextInt();

		for(int i = 0; i <= A; i++) {
			for(int j = 0; j <= B; j++) {
				difference = (X -(500*i + 100*j))/50;
				if(difference >= 0 && difference <= C) {
					judge++;
				}
			}
		}
		System.out.println(judge);
	}
}
/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