import java.util.*;
 
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 cnt = 0;
    for (int i = 0; i < A + 1; i++) {
      for (int j = 0; j < B + 1; j++) {
        for (int k = 0; k < C + 1; k++) {
          int total = 500*i+100*j+50*k;
          if (total == X) {
            cnt++;
          }
        }
      }
    }
    System.out.println(cnt);
  }
}
/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