Daily Coding Problem: Problem #588 [Easy]

Good morning! Here's your coding interview problem for today.

This problem was asked by Facebook.

You have a large array with most of the elements as zero.

Use a more space-efficient data structure, SparseArray, that implements the same interface:

• init(arr, size): initialize with the original large array and size.
• set(i, val): updates index at i with val.
• get(i): gets the value at index i.

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