Problem:
Score : 300 points

Problem Statement

You are given an integer N. Among the integers between 1 and N (inclusive), how many Shichi-Go-San numbers (literally "Seven-Five-Three numbers") are there?

Here, a Shichi-Go-San number is a positive integer that satisfies the following condition:

When the number is written in base ten, each of the digits 7, 5 and 3 appears at least once, and the other digits never appear.

Constraints

1 \leq N < 10^9

N is an integer.

Input

Input is given from Standard Input in the following format:

N

Output

Print the number of the Shichi-Go-San numbers between 1 and N (inclusive).

Sample Input 1

575

Sample Output 1

4

There are four Shichi-Go-San numbers not greater than 575: 357, 375, 537 and 573.

Sample Input 2

3600

Sample Output 2

13

There are 13 Shichi-Go-San numbers not greater than 3600: the above four numbers, 735, 753, 3357, 3375, 3537, 3557, 3573, 3575 and 3577.

Sample Input 3

999999999

Sample Output 3

26484

Solution in Java7 (OpenJDK 1.7.0) (judge verdict: Runtime Error)

package compareStr;

import java.io.PrintWriter;
import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		int ans = 0;
		boolean scount = false;
		boolean fcount = false;
		boolean tcount = false;
		boolean flag = true;
		Scanner sc = new Scanner(System.in);
		PrintWriter out = new PrintWriter(System.out);
		int N = Integer.parseInt(sc.next());
		sc.close();
		for (int i = 357; i < N + 1; i = i + 2) {
			String S = String.valueOf(i);
			int Slen = S.length();
			for (int j = 0; j < Slen; j++) {
				if (S.charAt(j) == '7') {
					scount = true;
				} else if (S.charAt(j) == '5') {
					fcount = true;
				} else if (S.charAt(j) == '3') {
					tcount = true;
				} else {
					flag = false;
					break;
				}
			}
			if (scount && fcount && tcount && flag) {
				ans = ans + 1;
			}
			scount = false;
			fcount = false;
			tcount = false;
			flag = true;
		} out.println(ans);
		out.flush();
	}

}