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3015. Count the Number of Houses at a Certain Distance I

LeetCodeBreadth-First SearchGraph TheoryPrefix SumOpen on judge ↗

You are given three positive integers n, x, and y. In a city, there exist houses numbered 1 to n connected by n streets. There is a street connecting the house numbered i with the house numbered i + 1 for all 1 <= i <= n - 1 . An additional street connects the house numbered x with the house numbered y. For each k, such that 1 <= k <= n, you need to find the number of pairs of houses (house1, ho

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solution.cppC++17

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