1: Write a function to check if a string can be made into a valid palindrome by swapping at most two characters.
2: Implement a function to find the minimal number of operations to transform a string into a valid cyclic shift of itself.
3: Write a function to find the lexicographically smallest substring that contains at least k distinct characters.
4: Implement a function to check if two strings can be made identical by reversing exactly two non-overlapping substrings.
5: Write a function to find the longest palindromic subsequence common to three given strings.
6: Implement a function to find the minimal number of adjacent swaps needed to transform one string into another.
7: Write a function to check if a string can be made into a palindrome by rearranging any two non-adjacent characters.
8: Implement a function to find the lexicographically largest string that can be formed by rotating its substrings.
9: Write a function to find the minimal number of substring reversals to transform a string into another string.
10: Implement a function to find the longest substring that can be rearranged into a palindrome using cyclic shifts.
C is a general-purpose programming language that is widely used for system programming and application development.
C++ is a high-level programming language that supports object-oriented, procedural, and generic programming paradigms.
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