1146. Snapshot Array

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Implement a SnapshotArray that supports the following interface: - SnapshotArray(int length) initializes an array-like data structure with the given length. Initially, each element equals 0. - void set(index, val) sets the element at the given index to be equal to val. - int snap() takes a snapshot of the array and returns the snap_id: the total number of times we called snap() minus 1. - int

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solution.cppC++17

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