Count Prefix and Suffix Pairs 1

Check if DFS Strings Are Palindromes

Distinct Echo Substrings

Longest Repeating Substring

Minimum Number of Valid Strings to Form Target I

Minimum Time to Revert Word to Initial State I

Minimum Time to Revert Word to Initial State II

Number of Distinct Islands

Number of Subarrays That Match a Pattern II

Unique Substrings With Equal Digit Frequency

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