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 n = X/ 500;
    int count = 0;

    for(int i = 0 ;i <=n && i <= A ;i++){
      int XX = X -500 * i;
      int m = XX/100;
      for(int j = 0;j <= m && j <= B ;j++){
        int XXX = XX - 100 * j;
        if(XXX/50 <= C){
          int p = XXX/50;//使用した50円玉
          int q = j;//使用した100円玉
          int r = i;//使用した500円玉
          count += 1;
        }
      }
    }


  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