import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int maxA = Integer.valueOf(sc.nextLine());
        int maxB = Integer.valueOf(sc.nextLine());
        int maxC = Integer.valueOf(sc.nextLine());
        int x = Integer.valueOf(sc.nextLine());
        int count = 0;
        for(int numA = 0; numA <= maxA; numA++){
            for(int numB = 0; numB <= maxB; numB++){
                int numC = (x - 500*numA - 100*numB) / 50;
                if(maxC >= numC && numC >= 0){
                    count++;
                }
            }
        }
        System.out.println(count);
        sc.close();
    }
}
/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