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 sum = 0;
        int answer = 0;

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

/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