Long Pressed Name
Your friend is typing his name into a keyboard. Sometimes, when typing a character c, the key might ...
Sort Array By Parity II
Given an array A of non-negative integers, half of the integers in A are odd, and half of the intege...
Reverse Only Letters
Given a string S, return the "reversed" string where all characters that are not a letter ...
X of a Kind in a Deck of Cards
In a deck of cards, each card has an integer written on it. Return true if and only if you can choos...
Smallest Range I
Given an array A of integers, for each integer A[i] we may choose any x with -K <= x <= K, and...
Sort Array By Parity
Given an array A of non-negative integers, return an array consisting of all the even elements of A,...
Increasing Order Search Tree
Given a binary search tree, rearrange the tree in in-order so that the leftmost node in the tree is ...
Monotonic Array
An array is monotonic if it is either monotone increasing or monotone decreasing. An array A is mono...
Fair Candy Swap
Alice and Bob have candy bars of different sizes: A[i] is the size of the i-th bar of candy that Ali...
Uncommon Words from Two Sentences
We are given two sentences A and B. (A sentence is a string of space separated words. Each word cons...