Here I have divided string problem in different category if you like please upvote .
Also suggestions are accepted
Parenthesis problem:-
1.https://leetcode.com/problems/generate-parentheses
2.https://leetcode.com/problems/score-of-parentheses
3.https://leetcode.com/problems/valid-parentheses
4.https://leetcode.com/problems/valid-parentheses Easy
5.https://leetcode.com/problems/remove-outermost-parentheses Easy
6.https://leetcode.com/problems/different-ways-to-add-parentheses/ Medium
7.https://leetcode.com/problems/remove-invalid-parentheses Hard
8.https://leetcode.com/problems/minimum-remove-to-make-valid-parentheses Medium
9.https://leetcode.com/problems/maximum-nesting-depth-of-the-parentheses Easy
10.https://leetcode.com/problems/longest-valid-parentheses/ Hard
Counting of substring based on some condition:-
1.https://leetcode.com/problems/number-of-wonderful-substrings Medium
2.https://leetcode.com/problems/sum-of-beauty-of-all-substrings/ Medium
3.https://leetcode.com/problems/maximum-number-of-occurrences-of-a-substring Medium
4.https://leetcode.com/problems/number-of-wonderful-substrings Medium
Check types of string:-
1.https://leetcode.com/problems/isomorphic-strings Easy
2.https://leetcode.com/problems/valid-anagram Easy
- https://leetcode.com/problems/additive-number Medium
4.https://leetcode.com/problems/buddy-strings Easy
5.https://leetcode.com/problems/longest-happy-prefix Hard
6.https://leetcode.com/problems/increasing-decreasing-string Easy
7.https://leetcode.com/problems/check-if-a-string-can-break-another-string Medium
8.https://leetcode.com/problems/determine-if-two-strings-are-close Medium
9.https://leetcode.com/problems/check-if-two-string-arrays-are-equivalent Easy
10.https://leetcode.com/problems/check-if-word-equals-summation-of-two-words Easy
11.https://leetcode.com/problems/check-if-one-string-swap-can-make-strings-equal Easy
Palindromic string:-
1.https://leetcode.com/problems/palindrome-partitioning Medium
2.https://leetcode.com/problems/palindrome-partitioning-ii Hard
3.https://leetcode.com/problems/valid-palindrome Easy
4.https://leetcode.com/problems/shortest-palindrome Hard
5.https://leetcode.com/problems/palindrome-pairs Hard
6.https://leetcode.com/problems/longest-palindrome Easy
7.https://leetcode.com/problems/longest-palindromic-subsequence Medium
8.https://leetcode.com/problems/find-the-closest-palindrome Hard
9.https://leetcode.com/problems/palindromic-substrings Medium
10.https://leetcode.com/problems/valid-palindrome-ii Easy
11.https://leetcode.com/problems/longest-chunked-palindrome-decomposition Hard 12.https://leetcode.com/problems/break-a-palindrome Medium
- https://leetcode.com/problems/can-make-palindrome-from-substring Medium
14.https://leetcode.com/problems/palindrome-partitioning-iii Hard
15.https://leetcode.com/problems/minimum-insertion-steps-to-make-a-string-palindrome Hard
16.https://leetcode.com/problems/remove-palindromic-subsequences Easy
16.https://leetcode.com/problems/construct-k-palindrome-strings Medium
17.https://leetcode.com/problems/split-two-strings-to-make-palindrome Medium
Sorting on String:-
1.https://leetcode.com/problems/sort-characters-by-frequency Medium
2.https://leetcode.com/problems/custom-sort-string
Longest and shortest kind of String Problem :-
https://leetcode.com/problems/longest-duplicate-substring Hard
2.https://leetcode.com/problems/longest-string-chain Medium
3.https://leetcode.com/problems/longest-common-subsequence Medium
4.https://leetcode.com/problems/longest-happy-string Medium
5.https://leetcode.com/problems/maximum-length-of-a-concatenated-string-with-unique-characters Medium
6.https://leetcode.com/problems/find-longest-awesome-substring Hard
7.https://leetcode.com/problems/largest-substring-between-two-equal-characters Easy
8.https://leetcode.com/problems/largest-odd-number-in-string Easy
Please give suggestions if you want to make any.
PLEASE UPVOTE IF YOU LIKE IT!
Also check out my Dynamic Programming Pattern list: https://leetcode.com/discuss/interview-question/1986802/Dynamic-Programming