Summer.KLeetcode Problem 121&122&123. Best Time to Buy and Sell Stock I/II/ IIIProblem 121:·4 min read·Nov 26, 2020----
Summer.KLeetcode Algorithm: Problem 20 & 22 (Totally different)Problem 20. Valid Parentheses·3 min read·Nov 25, 2020----
Summer.KLeetcode Algorithm Problem17: Combinations of a Phone NumberGiven a string containing digits from 2-9 inclusive, return all possible letter combinations that the number could represent. Return the…·2 min read·Nov 23, 2020----
Summer.KLeetcode Algorithm 18: 4SumGiven an array nums of n integers and an integer target, are there elements a, b, c, and d in nums such that a + b + c + d = target? Find…·1 min read·Nov 23, 2020----
Summer.KLeetcode Problem 15: 3SumGiven an array nums of n integers, are there elements a, b, c in nums such that a + b + c = 0? Find all unique triplets in the array which…·1 min read·Nov 23, 2020----
Summer.KLeetcode Problem 12: Integer to RomanRoman numerals are represented by seven different symbols: I, V, X, L, C, D and M.·2 min read·Nov 22, 2020----
Summer.KLeeetcode Problem 7. Reverse IntegerGiven a 32-bit signed integer, reverse digits of an integer.·1 min read·Nov 21, 2020----
