Leetcode List of solutions to LeetCode problems # Title Difficulty 39 Combination Sum medium 72 Edit Distance hard 78 Subsets medium 207 Course Schedule medium 210 Course Schedule 2 medium 322 Coin Change medium 377 Combination Sum 4 medium 392 Is Subsequence easy 518 Coin Change 2 medium 739 Daily Temperatures medium 743 Network Delay Time medium 947 Most Stones Removed With Same Row or Column medium 1143 Longest Common Subsequence medium 1334 Find the City With the Smallest Number of Neighbors at a Threshold Distance medium 1489 Find Critical and Pseudo-Critical Edges in Minimum Spanning Tree hard 1584 Min Cost to Connect All Points medium 1980 Find Unique Binary String medium 1981 Minimize the Difference Between Target and Chosen Elements medium 1984 Minimum Difference Between Highest and Lowest of K Scores easy 1985 Find the Kth Largest Integer in the Array medium 1986 Maximum Number of Work Sessions to Finish the Tasks medium 2027 Minimum Moves to Convert String easy 2028 Find Missing Observations medium 2032 Two Out of Three easy 2033 Minimum Operations to Make Uni-Value Grid medium 2034 Stock Price Fluctuation medium 2037 Minimum Number of Moves to Seat Everyone easy 2038 Remove Colored Pieces if both Neighbours are the Same Color medium 2039 The Time when the Network Becomes Idle medium 2042 Check if Numbers are Ascending in a Sentence easy 2043 Simple Bank System medium 2044 Count Number of Maximum Bitwise-OR Subsets medium 2045 Second Minimum Time to Reach Destination hard 2047 Number of Valid Words in a Sentence easy 2049 Count Nodes with the Highest Score medium 2050 Parallel Courses 3 hard 2053 Kth Distinct String in an Array easy 2055 Plates Between Candles medium 2058 Find the Minimum and Maximum Number of Nodes Between Critical Points medium 2059 Minimum Operations to Convert Number medium 2062 Count Vowel Substrings of a String easy 2073 Time Needed to Buy Tickets easy 2074 Reverse Nodes in Even Length Groups medium 2075 Decode the Slanted Cyphertext medium 2078 Two Furthest Houses With Different Colors easy 2079 Watering Plants medium 2080 Range Freq Queries medium 2085 Count Common Words with One Occurrence easy 2086 Minimum Number of Buckets to Collect Water from Houses medium 2087 Minimum Cost Homecoming of a Robot in a Grid medium 2089 Find Target Indices After Sorting Array easy 2090 K Radius Subarray Averages medium 2091 Removing Minimum and Maximum from Subarray medium 2092 Find All People With Secret hard 2094 Finding 3 Digit Even Numbers easy 2095 Delete the Middle node of a Linked List medium 2096 Step by Step Directions from a Binary Tree Node to Another medium 2099 Find Subsequence of Lenght K with the Largest Sum easy 2101 Detonate the Maximum Bombs medium 2103 Rings and Rods easy 2104 Sum of Subarray Ranges medium 2108 First Palindromic String in the Array easy 2109 Adding Spaces to a String medium 2110 Number of Smooth Descent Periods of a Stock medium 2114 Maximum Number of Words Found in Sentences easy 2115 Find All Possible Recipes from Given Supplies medium 2116 Check if a Parenthesis String can be Valid medium 2119 A Number After a Double Reversal easy 2120 Execution of All Suffix Instructions Staying in a Grid medium 2124 Check if all As Appear Before all Bs easy 2125 Number of Laser Beams in a Bank medium 2126 Destroying Asteroids medium 2133 Check if All Row and Column Contains Every Numbers easy 2138 Divide a String into Groups of Size K easy 2139 Minimum Moves to Reach Target Score medium