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 sum = 0;
		int count = 0;
		
		for (int i = 0; i <= a; i++) {
			
			for (int j = 0; j <= b; j++) {
				
				for (int j2 = 0; j2 <= c; j2++) {
					sum = (500 * i) + (100 * j) + (50 * j2);
					
					if(x == sum) {
						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