LIKE CODING

Ref [1]  https://leetcode.com/problems/generalized-abbreviation/

301. Remove Invalid Parentheses Hard 1678 71 Favorite Share Remove the minimum number of invalid parentheses in order to make t...

Question: Give a dictionary "dict" and a string "S", find the longest valid word in dict which is a substring of ...

You are playing the following Flip Game with your friend: Given a string that contains only these two characters:  +  and  - , you and you...

Given a  pattern  and a string  str , find if  str  follows the same pattern. Here  follow  means a full match, such that there is a b...

Question: schedules gives a number of courses and its possible time slots. Determine if there is a schedule in which all the courses can ...

282. Expression Add Operators Hard 1414 237 Add to List Share Given a string that contains only digits  0-9  and a target value, return all...

Given a string  s , return all the palindromic permutations (without duplicates) of it. Return an empty list if no palindromic permutati...

Question: Consider a LED clock. Eg., 06:30 is displayed by an array of LEDs as 110:11110. Note that the clock only needs 10 LEDs since the...

279. Perfect Squares Medium 3388 205 Add to List Share Given a positive integer  n , find the least number of perfect square numbers (for...

Ref [1] https://leetcode.com/problems/factor-combinations/ OJ

  216.   Combination Sum III Medium 1494 61 Add to List Share Find all valid combinations of  k  numbers that sum up to  n  such that the fo...