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Documentation of Solutions

no. Title lvl
E A S Y
0001 Two Sum Easy
0009 Palindrome Number Easy
0013 Roman to Integer (1) Easy
0013 Roman to Integer (2) Easy
0013 Roman to Integer (3) Easy
0014 Longest Common Prefix Easy
0020 Valid Parentheses (1) Easy
0020 Valid Parentheses (2) Easy
0021 Merge Two Sorted Lists Easy
0026 Remove Duplicates from Sorted Array (1) Easy
0026 Remove Duplicates from Sorted Array (2) Easy
0027 Remove Element Easy
0028 Find the Index of the First Occurrence in a String Easy
0066 Plus One Easy
0069 Sqrt(x) Easy
0070 Climbing Stairs Easy
0088 Merge Sorted Array (1) Easy
0088 Merge Sorted Array (2) [UN-ACCEPTED] Easy
0094 Binary Tree Inorder Traversal Easy
1331 Rank Transform of an Array Easy
1684 Count the Number of Consistent Strings Easy
1945 Sum of Digits of String After Convert Easy
2022 Convert 1D Array Into 2D Array Easy
3110 Score of a String Easy
M E D I U M
0002 Add Two Numbers Med.
0003 Longest Substring Without Repeating Characters Med.
0005 Longest Palindromic Substring Med.
0006 Zigzag Conversion Med.
0007 Reverse Integer Med.
0008 String to Integer (atoi) Med.
0011 Container With Most Water (1) Med.
0011 Container With Most Water (2) Med.
0011 Container With Most Water (3) Med.
0015 3Sum (1) [TIME-LIMIT-EXCEEDED] Med.
0015 3Sum (2) [TIME-LIMIT-EXCEEDED] Med.
0015 3Sum (3) Med.
0017 Letter Combinations of a Phone Number Med.
0018 4Sum Med.
0019 Remove Nth Node From End of List Med.
0029 Divide Two Integers (1) [TIME-LIMIT-EXCEEDED] Med.
0029 Divide Two Integers (2) Med.
0049 Group Anagrams Med.
0050 Pow(x, n) Med.
0179 Largest Number (1) Med.
0179 Largest Number (2) Med.
0386 Lexicographical Numbers Med.
0539 Minimum Time Difference Med.
0567 Permutation in String Med.
0725 Split Linked List in Parts Med.
0729 My Calendar I Med.
0731 My Calendar II Med.
0874 Walking Robot Simulation Med.
1310 XOR Queries of a Subarray Med.
1371 Find the Longest Substring Containing Vowels in Even Counts Med.
1894 Find the Student that Will Replace the Chalk Med.
2028 Find Missing Observations (1) [MEMORY-LIMIT-EXCEEDED] Med.
2028 Find Missing Observations (2) [TIME-LIMIT-EXCEEDED] Med.
2028 Find Missing Observations (3) Med.
2220 Minimum Bit Flips to Convert Number Med.
2326 Spiral Matrix IV Med.
2419 Longest Subarray With Maximum Bitwise AND Med.
2491 Divide Players Into Teams of Equal Skill Med.
2807 Insert Greatest Common Divisors in Linked List Med.
3043 Find the Length of the Longest Common Prefix Med.
3217 Delete Nodes From Linked List Present in Array Med.
H A R D
0004 Median of Two Sorted Arrays Hard
0023 Merge k Sorted Lists (1) [UN_ACCEPTED] Hard
0023 Merge k Sorted Lists (2) [UN_ACCEPTED] Hard
0023 Merge k Sorted Lists (3) Hard
0214 Shortest Palindrome Hard
0432 All O`one Data Structure Hard