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();
		int n=0;
		for (int i=0;i<(a+1);i++){
			for (int j=0;j<(b+1);j++){
				for (int k=0;k<(c+1);k++){
					if (500*i+100*j+50*k==x){
						n+=1;
					}
				}
			}
		}
		System.out.println(n);
	}
}
/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