Probability of Balance

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Park in Wonderland has recently installed a see-saw which consists of a metallic bar of length $N$ (where $N$ is even) supported by a single pivot point, located at the midpoint of the bar. Surprisingly the number of students in Wonderland School is also $N$ where the weight of the $i^{th}$ ($1 \leq i \leq N$) student is $i$. They together with their teacher Bob go to the park to experie

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solution.cppC++17

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