finds the peak element in the array :param arr: List[int] :return: the peak element int

Follower follows a followee. If the operation is invalid, it should be a no-op. */

The goal is to find the count of all options where A[i] + B[j] + C[k] + D[l] = 0 We can now change this to: A[i] + B[j] = - C[k] - D[l] Which equals

Decodes your encoded data to tree.

creates a two dimensional array holding a pascal triangle of the desired height :param num: int the height of the triangle

Get a random element from the set. */

helper will take the input array, the index or the position of the element on which we need to take the decision and the result vector of vectors

helper function for traversing over the tree nodes

this function will now check the nodes adjacent to the current node(i): if its white, it will change to blue and if its already filled, it will check

implementing a partial inorder traversal and pushing the left child node in the stack

This function will follow inorder traversal: 1. I will make a left call and check if it returned a non-zero value. 2. If there is a non-zero v

Inserts a value to the set. Returns true if the set did not already contain the specified element. */