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 count=0;
		for(int i=0;i<=a;++i) {
			for(int j=0;j<=b;++j) {
				if((x-500*i-100*j)/50>=0 && (x-500*i-100*j)/50<=c ) {
					++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