import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int a = Integer.parseInt(sc.next());
        int b = Integer.parseInt(sc.next());
        int c = Integer.parseInt(sc.next());
        int x = Integer.parseInt(sc.next());
        int count = 0;
        for(int i = 0; i <= a; i++) {
            if(500 * i > x) {
                break;
            }
            for(int j = 0; j <= b; j++) {
                if(500 * i + 100 * j > x) {
                    break;
                }
                for(int k = 0; k <= c; k++) {
                    if(500 * i + 100 * j + 50 * k > x) {
                        break;
                    }
                    int sum = 500 * i + 100 * j + 50 * k;
                    if(sum == x) {
                        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