Direction Swaps

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You are given a grid of size $n \times m$, which consists only of the direction signs $U,$ $D,$ $L,$ or $R$. An operation consists of the following: - Select any two adjacent signs that are directed towards each other, and swap them. What is the maximum number of operations that you can perform? $\textbf{Note}$: Two cells are adjacent if they have a common side. ### Input - The first line of in

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solution.cppC++17

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