Generate all subsets of a given set. In another words generate super set of a given set. Example- Given set {1,2,3}. Output- {}, {1}, {2}, {3}, {1,2}, {1,3}, {2,3}, {1,2,3}
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
Given a string containing only digits, restore it by returning all possible valid IP address combinations. For example: Given "25525511135" , return ["255.255.11.135", "255.255.111.35"] . (Order does not matter)
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