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Topic: String-question / Level: Advanced
521. Write a function to find the minimal number of adjacent swaps to make a string into an anagram of itself.
522. Implement a function to find the longest palindromic subsequence common to two strings by rotating their substrings.
523. Write a function to check if two strings can be transformed into each other by reversing exactly one substring.
524. Implement a function to find the lexicographically smallest palindrome that can be made by swapping adjacent characters.
525. Write a function to find the minimal number of operations to transform one string into another using only cyclic shifts and deletions.
526. Implement a function to find the longest palindrome that can be formed by rearranging the characters of a string using substring reversals.
527. Write a function to check if a string can be transformed into a palindrome by reversing any two non-overlapping substrings.
528. Implement a function to find the lexicographically smallest subsequence of a string that can be made into a palindrome by deleting characters.
529. Write a function to find the smallest number of adjacent swaps to transform a string into a valid rotation of itself.
530. Implement a function to check if two strings can be transformed into each other by rotating their substrings exactly once.
531. Write a function to find the longest palindrome that can be formed by rearranging the characters of two concatenated strings.
532. Implement a function to find the lexicographically smallest palindrome that can be made by deleting exactly two characters from a string.
533. Write a function to find the minimal number of operations to transform one string into a valid cyclic permutation of another string.
534. Implement a function to find the longest substring that contains at least k distinct characters in lexicographical order.
535. Write a function to check if a string can be transformed into another string by reversing any number of substrings.
536. Implement a function to find the minimal number of adjacent swaps to transform a string into a valid palindrome.
537. Write a function to find the lexicographically largest palindrome that can be formed by rearranging the characters of a string using cyclic shifts.
538. Implement a function to check if two strings are cyclic permutations of each other when one of them is reversed.
539. Write a function to find the minimal number of operations to transform a string into a palindrome by rotating its substrings.
540. Implement a function to find the longest palindrome that can be formed from a string by swapping adjacent characters.
541. Write a function to find the lexicographically smallest cyclic shift of a string that is also a valid anagram of another string.
542. Implement a function to find the minimal number of operations to transform one string into another by reversing its substrings.
543. Write a function to find the longest substring that can be rearranged into a palindrome by deleting exactly one character.
544. Implement a function to check if two strings can be transformed into each other by swapping at most one pair of characters.
545. Write a function to find the minimal number of adjacent swaps needed to make two strings cyclic permutations of each other.
546. Implement a function to find the lexicographically smallest palindrome that can be made by deleting at most two characters.
547. Write a function to find the smallest number of operations to transform a string into a valid anagram of another string using only cyclic shifts.
548. Implement a function to find the longest palindromic subsequence that can be formed from three concatenated strings.
549. Write a function to check if a string can be made into a valid palindrome by reversing its first and last substrings.
550. Implement a function to find the minimal number of adjacent swaps to transform one string into a valid cyclic shift of itself.
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Implement a function to find the k most frequent words in a string.
Write a function to count the number of distinct palindromic subsequences in a string.
Implement a function to count the number of substrings where each character occurs at least twice.
Write a function to find the smallest number of adjacent swaps to make two strings anagrams of each other.
Implement a function to find the longest palindrome that can be made from a string by swapping at most two characters.
Implement a function to determine the lexicographical rank of a string among its permutations.
Implement a function to check if two strings are one edit distance apart.
Implement a function to determine if a string is a valid IP address.
Write a function to find the longest substring that can be rearranged into a palindrome by deleting exactly one character.
Write a function to check if two strings can be made identical by reversing any two non-overlapping substrings.
Write a function to check if one string is a rotation of another string.
Write a function to remove all adjacent pairs of duplicate characters from a string until no such pairs exist.
Write a function to check if a string can be segmented into words from a dictionary.
Write a function to check if two strings can be made identical by swapping any two characters.
Write a function to find the smallest number of operations to transform a string into a valid anagram of another string using only cyclic shifts.