import java.util.*;

public class Main {
  public static void main(String[] argd) {
    Scanner sc = new java.util.Scanner(System.in);
    int A = Integer.parseInt(sc.nextLine());
    int B = Integer.parseInt(sc.nextLine());
    int C = Integer.parseInt(sc.nextLine());
    int X = Integer.parseInt(sc.nextLine());
    int count = 0;
    for (int a = 0; a <= A; a++) {
      for (int b = 0; b <= B; b++) {
        for (int c = 0; c <= C; c++) {
          int total = 500 * a + 100 * b + 50 * c;
          if (total == X) { count++; }
        }
      }
    }
    System.out.println(count);
  }
}

/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