This technical problem deals with determining whether or not a given string consisting of only brackets is valid. A string is considered valid if the open brackets are closed by the same type of brackets in the correct order. An empty string is also considered valid.

193

Dec 03
Given a list of integers, this code problem finds the largest integer in the list. For example, given the input [1, 2, 3, 4, 5], the output would be 5.

169

Dec 03
Given a string, reverse the order of the words. Do not use any built-in reverse functions.

147

Dec 01
This problem deals with printing the median of a stream of integers. At each time step, the median of the integers received so far is printed out.

200

Dec 01
This problem asks you to write a function that takes in a list of integers and returns the sum of the integers at even indices. For example, given the input list [1, 2, 3, 4, 5], the function should return 6 (2 + 4).

201

Nov 30
Implement a queue using two stacks. This means that when you enqueue an item, it goes onto one of the stacks, and when you dequeue an item, it comes off of the other stack.

187

Nov 29
Given a string of parentheses, this function determines whether the string is balanced. A string is balanced if each opening parentheses is matched by a closing parentheses. For example, the input "(())" would return True, while the input "())(" would return False.

171

Nov 28
The problem is to find the sum of all the integers in a stack. An example input is given, as well as the expected output.

122

Nov 28