import java.util.*;
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();
		
		sc.close();
		
		int res = 0;
				
		for (int a = 0; a <= A ; a++) {
			
			for (int b = 0 ; b <= B ; b++) {
				
				for (int c = 0 ; c <= C ; c ++ ) {
					
					int total = 500*a + 100*b + 50*c;
					
					if (total == X) res++;
				}
			}
			
		}
		
		System.out.println(res);
			
	}	


}
/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