CodeChef: Codechef
Site under maintenance
  • Register
  • Forgot Password?
  • PRACTICE
    • Easy
    • Medium
    • Hard
  • COMPETE
    • August Mini Challenge
    • August Algorithm Challenge
    • July Algorithm Challenge
    • June Algorithm Challenge
    • May Gamers Challenge
  • DISCUSS
    • Forums
    • Blog
    • Twitter
  • COMMUNITY
    • CodeChef TechTalks
    • CodeChef Meetups
    • Campus Chapters
    • Host Your Contest
    • User Groups
  • HELP
    • Frequently Asked Questions
    • FAQ for Problem Setters
    • Tutorial: Paying Up
    • Tutorial: Small Factorials
    • Tutorial: Input and Output(I/O)
    • Tutorial: Your First Non-Trivial Problem
  • ABOUT
    • About CodeChef
    • About Directi
    • CEO's Corner
    • Press Room
    • Careers

Home » Problems (easy) » Factorial

Factorial

Problem code: FCTRL

  • Submit
  • All submissions

All submissions for this problem are available.

The most important part of a GSM network is so called Base Transceiver Station (BTS). These transceivers form the areas called cells (this term gave the name to the cellular phone) and every phone connects to the BTS with the strongest signal (in a little simplified view). Of course, BTSes need some attention and technicians need to check their function periodically.

The technicians faced a very interesting problem recently. Given a set of BTSes to visit, they needed to find the shortest path to visit all of the given points and return back to the central company building. Programmers have spent several months studying this problem but with no results. They were unable to find the solution fast enough. After a long time, one of the programmers found this problem in a conference article. Unfortunately, he found that the problem is so called "Traveling Salesman Problem" and it is very hard to solve. If we have N BTSes to be visited, we can visit them in any order, giving us N! possibilities to examine. The function expressing that number is called factorial and can be computed as a product
1.2.3.4....N. The number is very high even for a relatively small N.

The programmers understood they had no chance to solve the problem. But because they have already received the research grant from the government, they needed to continue with their studies and produce at least some results. So they started to study behavior of the factorial function.

For example, they defined the function Z. For any positive integer N, Z(N) is the number of zeros at the end of the decimal form of number N!. They noticed that this function never decreases. If we have two numbers N1<N2, then Z(N1) <= Z(N2). It is because we can never "lose" any trailing zero by multiplying by any positive number. We can only get new and new zeros. The function Z is very interesting, so we need a computer program that can determine its value efficiently.

Input

There is a single positive integer T on the first line of input (equal to about 100000). It stands for the number of numbers to follow. Then there are T lines, each containing exactly one positive integer number N, 1 <= N <= 1000000000.

Output

For every number N, output a single line containing the single non-negative integer Z(N).

Example

Sample Input:

6
3
60
100
1024
23456
8735373

Sample Output:

0
14
24
253
5861
2183837


Date:2008-12-01
Time limit:8s
Source limit:50000B
Languages:All except: TCL PERL6
Resource:ACM Central European Programming Contest, Prague 2000


  • Submit

Comments

Loading Comments...

SUCCESSFUL SUBMISSIONS FOR THIS PROBLEM:

Loading Submissions...

RECENT ACTIVITY FOR THIS PROBLEM:

Loading Recent Activity...

HELP

Program should read from standard input and write to standard output.

After you submit a solution you can see your results by clicking on the [My Submissions] tab on the problem page. Below are the possible results:

  • Accepted Your program ran successfully and gave a correct answer. If there is a score for the problem, this will be displayed in parenthesis next to the checkmark.
  • Time Limit Exceeded Your program was compiled successfully, but it didn't stop before time limit. Try optimizing your approach.
  • Wrong Answer Your program compiled and ran succesfully but the output did not match the expected output.
  • Runtime Error Your code compiled and ran but encountered an error. The most common reasons are using too much memory or dividing by zero. For the specific error codes see the help section.
  • Compilation Error Your code was unable to compile. When you see this icon, click on it for more information.

If you are still having problems, see a sample solution here.

  • About CodeChef
  • About Directi
  • CEO's Corner
  • Careers
  • feedback@codechef.com

© 2009 Directi Group. All Rights Reserved. CodeChef uses SPOJ © by Sphere Research Labs

Sponsors
The time now is: