Problem 1

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Hidden ### Input - First line will contain an integer $N$, length of the string. - Second line contains a string $S$ of size $N$. ### Output Print $YES$ or $NO$. ### Constraints - $1 \leq N \leq 1000$ ### Subtasks - 30 points : $1 \leq R \leq 10000$ - 70 points : $1 \leq R \leq 10^9$ ### Sample Test Cases **Sample 1** Input: ``` 4 ABBA ``` Output: ``` YES ``` **Sample 2** Input: ``` 5 HABBA

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solution.cppC++17

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