String

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# Title Acceptance Difficulty
680 Valid Palindrome II 30.4% Easy
678 Valid Parenthesis String 28.1% Medium
657 Judge Route Circle 68.9% Easy
647 Palindromic Substrings 55.4% Medium
635 Design Log Storage System 48.5% Medium
632 Smallest Range 42.1% Hard
616 Add Bold Tag in String 38.2% Medium
609 Find Duplicate File in System 52.5% Medium
606 Construct String from Binary Tree 49.8% Easy
591 Tag Validator 29.0% Hard
583 Delete Operation for Two Strings 44.2% Medium
564 Find the Closest Palindrome 17.3% Hard
557 Reverse Words in a String III 59.6% Easy
556 Next Greater Element III 28.9% Medium
555 Split Concatenated Strings 35.9% Medium
553 Optimal Division 55.2% Medium
551 Student Attendance Record I 44.0% Easy
544 Output Contest Matches 71.2% Medium
541 Reverse String II 43.7% Easy
539 Minimum Time Difference 45.7% Medium
537 Complex Number Multiplication 63.9% Medium
536 Construct Binary Tree from String 40.9% Medium
527 Word Abbreviation 41.4% Hard
522 Longest Uncommon Subsequence II 31.5% Medium
521 Longest Uncommon Subsequence I 55.5% Easy
520 Detect Capital 51.8% Easy
468 Validate IP Address 20.9% Medium
459 Repeated Substring Pattern 38.0% Easy
434 Number of Segments in a String 36.7% Easy
408 Valid Word Abbreviation 28.1% Easy
385 Mini Parser 30.6% Medium
383 Ransom Note 47.2% Easy
345 Reverse Vowels of a String 38.6% Easy
344 Reverse String 59.3% Easy
340 Longest Substring with At Most K Distinct Characters 38.8% Hard
336 Palindrome Pairs 26.3% Hard
293 Flip Game 56.1% Easy
273 Integer to English Words 22.2% Hard
271 Encode and Decode Strings 26.2% Medium
249 Group Shifted Strings 41.8% Medium
227 Basic Calculator II 29.3% Medium
214 Shortest Palindrome 24.4% Hard
186 Reverse Words in a String II 27.4% Medium
165 Compare Version Numbers 20.2% Medium
161 One Edit Distance 31.3% Medium
159 Longest Substring with At Most Two Distinct Characters 41.4% Hard
158 Read N Characters Given Read4 II - Call multiple times 24.3% Hard
157 Read N Characters Given Read4 29.0% Easy
151 Reverse Words in a String 15.7% Medium
126 Word Ladder II 14.3% Hard
125 Valid Palindrome 26.4% Easy
115 Distinct Subsequences 31.7% Hard
97 Interleaving String 24.7% Hard
93 Restore IP Addresses 27.6% Medium
91 Decode Ways 19.8% Medium
87 Scramble String 29.3% Hard
76 Minimum Window Substring 25.6% Hard
72 Edit Distance 31.9% Hard
71 Simplify Path 25.5% Medium
68 Text Justification 19.2% Hard
67 Add Binary 32.7% Easy
65 Valid Number 12.8% Hard
58 Length of Last Word 31.9% Easy
49 Group Anagrams 35.4% Medium
44 Wildcard Matching 20.3% Hard
43 Multiply Strings 27.3% Medium
38 Count and Say 35.0% Easy
32 Longest Valid Parentheses 23.1% Hard
30 Substring with Concatenation of All Words 22.0% Hard
28 Implement strStr() 28.3% Easy
22 Generate Parentheses 45.5% Medium
20 Valid Parentheses 33.5% Easy
17 Letter Combinations of a Phone Number 34.8% Medium
14 Longest Common Prefix 31.5% Easy
13 Roman to Integer 46.1% Easy
12 Integer to Roman 45.1% Medium
10 Regular Expression Matching 24.1% Hard
8 String to Integer (atoi) 14.0% Medium
6 ZigZag Conversion 26.8% Medium
5 Longest Palindromic Substring 25.2% Medium
3 Longest Substring Without Repeating Characters 24.4% Medium