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 sumv, cnt=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++ ) {
		    sumv = 500*i + 100*j + 50*k;
		    if ( sumv == x ) {
			cnt++;
		    }
		}
	    }
	}
	System.out.println(cnt);
    }
    
}
/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