String

No.	Title	Solution	Difficulty	TimeComplexity	SpaceComplexity	Favorite	Acceptance
0003	Longest Substring Without Repeating Characters		Medium	O(n)	O(1)	❤️	31.3%
0013	Roman to Integer		Easy				56.4%
0017	Letter Combinations of a Phone Number		Medium	O(log n)	O(1)		48.8%
0020	Valid Parentheses		Easy	O(log n)	O(1)		39.8%
0022	Generate Parentheses		Medium	O(log n)	O(1)		64.9%
0028	Implement strStr()		Easy	O(n)	O(1)		35.1%
0030	Substring with Concatenation of All Words		Hard	O(n)	O(n)	❤️	26.1%
0049	Group Anagrams		Medium	O(n log n)	O(n)		58.9%
0067	Add Binary		Easy				46.7%
0071	Simplify Path		Medium	O(n)	O(n)		33.6%
0076	Minimum Window Substring		Hard	O(n)	O(n)	❤️	35.8%
0091	Decode Ways		Medium	O(n)	O(n)		26.3%
0093	Restore IP Addresses		Medium	O(n)	O(n)	❤️	37.3%
0125	Valid Palindrome		Easy	O(n)	O(1)		38.0%
0126	Word Ladder II		Hard	O(n)	O(n^2)	❤️	23.5%
0151	Reverse Words in a String		Medium				23.4%
0344	Reverse String		Easy	O(n)	O(1)		70.1%
0345	Reverse Vowels of a String		Easy	O(n)	O(1)		44.9%
0385	Mini Parser		Medium				34.3%
0387	First Unique Character in a String		Easy				53.7%
0537	Complex Number Multiplication		Medium				68.3%
0541	Reverse String II		Easy				49.0%
0557	Reverse Words in a String III		Easy				71.6%
0632	Smallest Range Covering Elements from K Lists		Hard				54.0%
0767	Reorganize String		Medium	O(n log n)	O(log n)	❤️	49.9%
0819	Most Common Word		Easy				45.4%
0842	Split Array into Fibonacci Sequence		Medium	O(n^2)	O(1)	❤️	36.7%
0856	Score of Parentheses		Medium	O(n)	O(n)		62.3%
0925	Long Pressed Name		Easy	O(n)	O(1)		38.3%
1003	Check If Word Is Valid After Substitutions		Medium	O(n)	O(1)		56.2%
1108	Defanging an IP Address		Easy				88.5%
1170	Compare Strings by Frequency of the Smallest Character		Medium				59.5%
1189	Maximum Number of Balloons		Easy				61.7%
1221	Split a String in Balanced Strings		Easy				84.1%
1234	Replace the Substring for Balanced String		Medium				34.4%
1455	Check If a Word Occurs As a Prefix of Any Word in a Sentence		Easy				64.6%
1573	Number of Ways to Split a String		Medium				30.9%
1653	Minimum Deletions to Make String Balanced		Medium				50.2%
1662	Check If Two String Arrays are Equivalent		Easy				83.5%
1668	Maximum Repeating Substring		Easy				38.6%
1678	Goal Parser Interpretation		Easy				86.3%
1684	Count the Number of Consistent Strings		Easy				83.9%
1694	Reformat Phone Number		Easy				66.7%
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