LeetCode | Python solutions of LeetCode questions | Computer Vision library

LeetCode is a Python library typically used in Artificial Intelligence, Computer Vision applications. LeetCode has no bugs, it has no vulnerabilities, it has a Permissive License and it has low support. However LeetCode build file is not available. You can download it from GitHub.

| # | problem | difficulty | solution | |---|---------|------------|----------| 1 | two sum | easy | python 2 | add two numbers | medium | python 3 | longest substring without repeating characters | medium |python 4 | median of two sorted arrays | hard | python 5 | longest palindromic substring | medium | python 6 | zigzag conversion | medium | python 7 | reverse integer | easy | python 8 | string to integer (atoi) | medium | python 9 | palindrome number | easy | python 11 | container with most water | medium | python 12 | integer to roman | medium | python 13 | roman to integer | easy | python 14 | longest common prefix | easy | python 15 | 3sum | medium | python 16 | 3sum closest | medium | python 17 | letter combinations of a phone number | medium | python 18 | 4sum | medium | python 19 | remove nth node from end of list | medium | python 20 | valid parentheses | easy | python 21 | merge two sorted lists | easy | python 22 | generate parentheses | medium | python 23 | merge k sorted lists | hard | python 24 | swap nodes in pairs | medium | python 26 | remove duplicates from sorted array | easy | python 27 | remove element | easy | python 28 | implement strstr() | easy | python 29 | divide two integers | medium | python 31 | next permutation | medium | python 34 | find first and last position of element in sorted array | medium | python 35 | search insert position | easy | python 36 | valid sudoku | medium | python 37 | sudoku solver | hard | python 38 | count and say | easy | python 39 | combination sum | medium | python 40 | combination sum ii | medium | python 42 | trapping rain water | hard | python 46 | permutations | medium | python 47 | permutations ii | medium | python 49 | group anagrams | medium | python 50 | pow(x, n) | medium | python 51 | n-queens | hard | python 52 | n-queens ii | hard | python 53 | maximum subarray | easy | python 54 | spiral matrix | medium | python 56 | merge intervals | medium | python 58 | length of last word | easy | python 62 | unique paths | medium | python 63 | unique paths ii | medium | python 64 | minimum path sum | medium | python 66 | plus one | easy | python 67 | add binary | easy | python 69 | sqrt(x) | easy | python 70 | climbing stairs | easy | python 73 | set matrix zeroes | medium | python 75 | sort colors | medium | python 76 | minimum window substring | hard | python 78 | subsets | medium | python 79 | word search | medium | python 83 | remove duplicates from sorted list | easy | python 88 | merge sorted array | easy | python 90 | subsets ii | medium | python 98 | validate binary search tree | medium | python 100 | same tree | easy | python 101 | symmetric tree | easy | python 104 | maximum depth of binary tree | easy | python 107 | binary tree level order traversal ii | easy | python 108 | convert sorted array to binary search tree | easy | python 110 | balanced binary tree | easy | python 111 | minimum depth of binary tree | easy | python 112 | path sum | easy | python 113 | path sum ii | medium | python 118 | pascal's triangle | easy | python 119 | pascal's triangle ii | easy | python 121 | best time to buy and sell stock | easy | python 122 | best time to buy and sell stock ii | easy | python 123 | best time to buy and sell stock iii | hard | python 124 | binary tree maximum path sum | hard | python 125 | valid palindrome | easy | python 136 | single number | easy | python 137 | single number ii | medium | python 138 | copy list with random pointer | medium | python 139 | word break | medium | python 140 | word break ii | hard | python 141 | linked list cycle | easy | python 142 | linked list cycle ii | medium | python 146 | lru cache | hard | python 149 | max points on a line | hard | python 151 | reverse words in a string | medium | python 155 | min stack | easy | python 157 | read n characters given read4 | easy | python 159 | longest substring with at most two distinct characters | hard | python 163 | missing ranges | medium | python 167 | two sum ii - input array is sorted | easy | python 169 | majority element | easy | python 171 | excel sheet column number | easy | python 173 | binary search tree iterator | medium | python 174 | dungeon game | hard | python 186 | reverse words in a string ii | medium | python 189 | rotate array | easy | python 191 | number of 1 bits | easy | python 198 | house robber | easy | python 200 | number of islands | medium | python 203 | remove linked list elements | easy | python 204 | count primes | easy | python 205 | isomorphic strings | easy | python 206 | reverse linked list | easy | python 208 | implement trie (prefix tree) | medium | python 212 | word search ii | hard | python 213 | house robber ii | medium | python 215 | kth largest element in an array | medium | python 216 | combination sum iii | medium | python 217 | contains duplicate | easy | python 218 | the skyline problem | hard | python 219 | contains duplicate ii | easy | python 220 | contains duplicate iii | medium | python 222 | count complete tree nodes | medium | python 226 | invert binary tree | easy | python 230 | kth smallest element in a bst | medium | python 232 | implement queue using stacks | easy | python 234 | palindrome linked list | easy | python 237 | delete node in a linked list | easy | python 239 | sliding window maximum | hard | python 242 | valid anagram | easy | python 243 | shortest word distance | easy | python 246 | strobogrammatic number | easy | python 247 | strobogrammatic number ii | medium | python 250 | count univalue subtrees | medium | python 256 | paint house | easy | python 258 | add digits | easy | python 259 | 3sum smaller | medium | python 263 | ugly number | easy | python 265 | paint house ii | hard | python 266 | palindrome permutation | easy | python 268 | missing number | easy | python 269 | alien dictionary | hard | python 270 | closest binary search tree value | easy | python 271 | encode and decode strings | medium | python 276 | paint fence | easy | python 278 | first bad version | easy | python 283 | move zeroes | easy | python 284 | peeking iterator | medium | python 285 | inorder successor in bst | medium | python 288 | unique word abbreviation | medium | python 289 | game of life | medium | python 292 | nim game | easy | python 293 | flip game | easy | python 295 | find median from data stream | hard | python 297 | serialize and deserialize binary tree | easy | python 298 | binary tree longest consecutive sequence | medium | python 299 | bulls and cows | medium | python 303 | range sum query - immutable | easy | python 304 | range sum query 2d - immutable | medium | python 305 | number of islands ii | hard | python 307 | range sum query - mutable | medium | python 318 | maximum product of word lengths | medium | python 322 | coin change | medium | python 339 | nested list weight sum | easy | python 340 | longest substring with at most k distinct characters | hard | python 344 | reverse string | easy | python 345 | reverse vowels of a string | easy | python 346 | moving average from data stream | easy | python 348 | design tic-tac-toe | medium | python 349 | intersection of two arrays | easy | python 350 |