import java.util.*;

public class Main {

    public static void main(String args[]) {

        // 入力
        Scanner sc = new Scanner(System.in);
        int a = Integer.parseInt(sc.next());
        int b = Integer.parseInt(sc.next());
        int c = Integer.parseInt(sc.next());
        int x = Integer.parseInt(sc.next());
        sc.close();

        // 主処理
        int result = 0;
        for (int i = 0; i <= a; i++) {
            for (int j = 0; j <= b; j++) {
                for (int j2 = 0; j2 <= c; j2++) {
                    int value = 500 * i + 100 * j + 50 * j2;
                    if (value == x) {
                        result++;
                    }
                }
            }
        }

        // 出力
        System.out.println(result);
    }
}

/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