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## LeetCode – 703. Kth Largest Element in a Stream

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Design a class to find the kth largest element in a stream. Note that it is the kth largest element in the sorted order,...

## LeetCode – 905. Sort Array By Parity

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Given an array A of non-negative integers, return an array consisting of all the even elements of A, followed by all the...

## LeetCode – 231. Power of Two

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Given an integer, write a function to determine if it is a power of two. Example 1: Input: 16 Output: true Example 2: In...

## LeetCode – 929. Unique Email Addresses

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Every email consists of a local name and a domain name, separated by the @ sign. For example, in alice@leetcode.com, ali...

## LeetCode – 804. Unique Morse Code Words

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International Morse Code defines a standard encoding where each letter is mapped to a series of dots and dashes, as foll...

## LeetCode – 206. Reverse Linked List

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Reverse a singly linked list. Example: Input: 1->2->3->4->5->NULL Output: 5->4->3->2->1->N...

## LeetCode – 24. Swap Nodes in Pairs

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Given a linked list, swap every two adjacent nodes and return its head. Example: Given 1->2->3->4, you should r...

## LeetCode – 581. Shortest Unsorted Continuous Subarray

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Given an integer array, you need to find one continuous subarray that if you only sort this subarray in ascending order,...

## LeetCode – 437. Path sum III

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You are given a binary tree in which each node contains an integer value. Find the number of paths that sum to a given v...

## LeetCode – Subarray sum equals k

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Given an array of integers and an integer k, you need to find the total number of continuous subarrays whose sum equals ...