Tiger's leetcode solution

For a undirected graph with tree characteristics, we can choose any node as the root. The result graph is then a rooted tree. Among all poss...

Q: Given an unsorted array return whether an increasing subsequence of length 3 exists or not in the array. Formally the function should...

Q: Write a function that takes a string as input and returns the string reversed. Example: Given s = "hello", return "ol...

The thief has found himself a new place for his thievery again. There is only one entrance to this area, called  root . Besides the  root , ...

Given a non negative integer number  num . For every numbers  i  in the range  0 ≤ i ≤ num  calculate the number of 1's in their binary ...

Q: Given an integer (signed 32 bits), write a function to check whether it is a power of 4. Example: Given num = 16, return true. Given...

Q: Given a positive integer  n , break it into the sum of  at least  two positive integers and maximize the product of those integers. Ret...