import java.util.Scanner;
class Main{
    public static void main(String[] args) {
        Scanner scn= new Scanner(System.in);
        int a=scn.nextInt();
        int b=scn.nextInt();
        int c=scn.nextInt();
        int x=scn.nextInt();
        int answer=0;
        for(int i=0;i<=a;i++){
            for(int j=0;j<=b;j++){
                for(int k=0;k<=c;k++){
                    if(500*i+100*j+50*k==x) answer++;
                }
            }
        }
        System.out.println(answer);
    }
}
/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