import java.util.*;

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 count = 0;
    for (int i = 0; i <= a; i++) {
      for (int j = 0; j <= b; j++) {
        int sum = i * 500 + j * 100;
        if (sum > x) break;
        if ((x - sum) % 50 == 0 && (x - sum) <= 50 * c) {
          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