LeetCode 527. Word Abbreviation
Given an array of n distinct non-empty strings, you need to generate minimal possible abbreviations for every word following rules below.
LeetCode 536. Construct Binary Tree from String
You need to construct a binary tree from a string consisting of parenthesis and integers.
The whole input represents a binary tree. It contains an integer followed by zero, one or two ...
LeetCode 539. Minimum Time Difference
Given a list of 24-hour clock time points in "Hour:Minutes" format, find the minimum minutes difference between any two time points in the list.
Example 1:
Input: ["23:59","00:00"] Output: 1 ...
LeetCode 541. Reverse String II
Given a string and an integer k, you need to reverse the first k characters for every 2k characters counting from the start of the string. If there are less than k characters left ...
LeetCode 540. Single Element in a Sorted Array
Given a sorted array consisting of only integers where every element appears twice except for one element which appears once. Find this single element that appears only once.
Example 1:
Input ...