[MS]Form Largest Number from given number
Write a function to make the largest number from the digits of a given number.
Example.
number: 32441
Output: 44321
Example.
number: 32441
Output: 44321
Given an integer n, write a function that returns count of trailing zeroes in n!. Examples: Input: n = 5 Output: 1 Factorial of 5 is 20 which has one trailing 0. Input: n = 20 Output: 4 Factorial of 20 is 2432902008176640000 which has 4 trailing zeroes. Input: n = 100 Output: 24
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