/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
 
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
	public static int trailingZeroes(int n) {
        int ret = 0, divider = 5;
 
        while (n / 5 != 0) {
            ret += n / 5;
            n /= 5;
        }
 
        return ret;
    }
	public static void main (String[] args) throws java.lang.Exception
	{
		System.out.println(trailingZeroes(130));
	}
}

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