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Check if DFS Strings Are Palindromes

Check if Every Row and Column Contains All Numbers

Check if Matrix Is X-Matrix

Check If N and Its Double Exist

Check If String Is Transformable With Substring Sort Operations

Check if Strings Can be Made Equal With Operations II

Check if There is a Path With Equal Number of 0's And 1's

Check if There Is a Valid Parentheses String Path

Check if Two Chessboard Squares Have the Same Color

Check If Two Expression Trees are Equivalent