Matchsticks

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Chef Ceil has some matchsticks in his kitchen. **Detail of matchsticks:** There are $N$ matchsticks in total. They are numbered from to $0$ to $N-1$ inclusive. The $i^{th}$ matchstick takes $b_{i}$ time to burn when lighted at one end, and it burns at a uniform rate. If lighted at both ends simultaneously, the matchstick will take only half of the original time to burn down. **Arrangement:**

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solution.cppC++17

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