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README.md		README.md
factorial-trailing-zeroes.go		factorial-trailing-zeroes.go
factorial-trailing-zeroes_test.go		factorial-trailing-zeroes_test.go

README.md

172. Factorial Trailing Zeroes

Given an integer n, return the number of trailing zeroes in n!.

Example 1:

Input: 3
Output: 0
Explanation: 3! = 6, no trailing zero.

Example 2:

Input: 5
Output: 1
Explanation: 5! = 120, one trailing zero.

**Note: **Your solution should be in logarithmic time complexity.