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+// Try POH%0A// author: Leonardone @ NEETSDKASU%0Aimport java.io.*;%0Aimport java.util.*;%0A%0Apublic class Main %7B%0A    public static void main(String%5B%5D args) throws Exception %7B%0A        Scanner in = new Scanner(System.in);%0A        %0A        final long MOD = 1_000_000_000L;%0A        long n = in.nextLong();%0A        long r = 1L, b = 0L;%0A        %0A        for (long i = 1; i %3C= n; i++) %7B%0A            long t = i;%0A            while (t %25 2L == 0L) %7B%0A                t /= 2L;%0A                b++;%0A            %7D%0A            while (t %25 5L == 0L) %7B%0A                t /= 5L;%0A                b--;%0A            %7D%0A            r = (r * t) %25 MOD;%0A        %7D%0A        %0A        for (long i = 0;+ i %3C b; i++) %7B%0A            r = (r * 2L) %25 MOD;%0A        %7D%0A        %0A        System.out.println(r);%0A    %7D%0A%7D%0A

Create Main.java