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String
String
0/106 solved
Longest Substring Without Repeating Characters
MEDIUM
Longest Palindromic Substring
MEDIUM
Valid Parentheses
EASY
Generate Parentheses
MEDIUM
Group Anagrams
MEDIUM
Letter Combinations of a Phone Number
MEDIUM
Longest Common Prefix
EASY
Minimum Window Substring
HARD
Word Break
MEDIUM
Word Search
MEDIUM
Roman to Integer
EASY
Longest Valid Parentheses
HARD
Valid Anagram
EASY
Find All Anagrams in a String
MEDIUM
Regular Expression Matching
HARD
Word Ladder
HARD
Decode Ways
MEDIUM
Permutation in String
MEDIUM
Implement Trie (Prefix Tree)
MEDIUM
Palindromic Substrings
MEDIUM
Serialize and Deserialize Binary Tree
HARD
Valid Palindrome
EASY
Add Binary
EASY
Word Search II
HARD
Evaluate Division
MEDIUM
First Unique Character in a String
EASY
Reorganize String
MEDIUM
Sort Characters By Frequency
MEDIUM
Wildcard Matching
HARD
Valid Palindrome II
EASY
Top K Frequent Words
MEDIUM
Design Add and Search Words Data Structure
MEDIUM
Backspace String Compare
EASY
Word Break II
HARD
Multiply Strings
MEDIUM
Minimum Remove to Make Valid Parentheses
MEDIUM
Accounts Merge
MEDIUM
Binary Tree Paths
EASY
Remove All Adjacent Duplicates In String
EASY
Basic Calculator
HARD
Longest Substring with At Least K Repeating Characters
MEDIUM
Valid Parenthesis String
MEDIUM
Basic Calculator II
MEDIUM
Word Ladder II
HARD
Remove Invalid Parentheses
HARD
Remove All Adjacent Duplicates in String II
MEDIUM
Simplify Path
MEDIUM
Excel Sheet Column Title
EASY
String Compression
MEDIUM
Add Strings
EASY
String to Integer (atoi)
MEDIUM
Verifying an Alien Dictionary
EASY
Open the Lock
MEDIUM
Reverse Vowels of a String
EASY
Minimum Add to Make Parentheses Valid
MEDIUM
Palindrome Pairs
HARD
Alien Dictionary
HARD
Count and Say
MEDIUM
Custom Sort String
MEDIUM
Integer to English Words
HARD
Serialize and Deserialize BST
MEDIUM
Expression Add Operators
HARD
Buddy Strings
EASY
Check If Two String Arrays are Equivalent
EASY
Longest Substring with At Most K Distinct Characters
MEDIUM
Shuffle String
EASY
Repeated String Match
MEDIUM
Maximum Nesting Depth of the Parentheses
EASY
Similar String Groups
HARD
Prefix and Suffix Search
HARD
Longest Substring with At Most Two Distinct Characters
MEDIUM
Fraction to Recurring Decimal
MEDIUM
Longest Word in Dictionary
MEDIUM
Count Different Palindromic Subsequences
HARD
Count Items Matching a Rule
EASY
Stream of Characters
HARD
Uncommon Words from Two Sentences
EASY
Group Shifted Strings
MEDIUM
Decode Ways II
HARD
Stamping The Sequence
HARD
Minimum Window Subsequence
HARD
One Edit Distance
MEDIUM
Valid Number
HARD
Remove Sub-Folders from the Filesystem
MEDIUM
Longest Absolute File Path
MEDIUM
Shortest Way to Form String
MEDIUM
Stickers to Spell Word
HARD
Minimum Insertions to Balance a Parentheses String
MEDIUM
Basic Calculator III
HARD
Maximum Number of Occurrences of a Substring
MEDIUM
Check if One String Swap Can Make Strings Equal
EASY
Add Bold Tag in String
MEDIUM
Construct Binary Tree from String
MEDIUM
Palindrome Permutation
EASY
Validate IP Address
MEDIUM
Rearrange String k Distance Apart
HARD
Goat Latin
EASY
Strobogrammatic Number II
MEDIUM
Valid Word Abbreviation
EASY
Valid Palindrome III
HARD
Strobogrammatic Number
EASY
Groups of Special-Equivalent Strings
MEDIUM
Maximum Nesting Depth of Two Valid Parentheses Strings
MEDIUM
Vowel Spellchecker
MEDIUM
Unique Word Abbreviation
MEDIUM
Sentence Similarity
EASY