import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int a = scanner.nextInt();
        int b = scanner.nextInt();
        int c = scanner.nextInt();
        int x = scanner.nextInt();
        int cnt=0;

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