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 ans = 0;

    for (int i = 0; i <= a; i++) {
      for (int j = 0; j <= b; j++) {
        int cAns = (x -  (500 * i + 100 * j))/ 50;
        if(0 <= cAns && cAns <= c){
          ans++;
        }
      }
    }
    System.out.println(ans);
    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