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 yono = 0;
                for(int i = 0 ; i <= a ; i++){
                        for(int j = 0 ; j <= b ; j++){
                                for(int k = 0 ; k <= c ; k++){
                                        if(x == 500 * i + 100 * j + 50 * k) yono++;
                                }
                        }
                }
                System.out.println(yono);
        }
}//0=48
//鶏になれ
/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