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Grokking the Coding Interview Patterns in C++

Solution: Construct Target Array With Multiple Sums

Explore how to solve the problem of constructing a target array starting from all ones by optimizing with max heaps and backward calculation. Learn to use modulo operations to reduce complexity and verify feasibility of construction, improving your skills in dynamic data problems and algorithmic efficiency.

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Statement

You are given an array target of n integers.

Starting from an array arr of size n where every element is 1, you may perform the following operation any number of times:

  • Let x be the sum of all current elements in arr.

  • Pick an index i and set arr[i] = x.

Your task is to return True if it’s possible to construct target from arr, otherwise return False.

Constraints:

  • n == target.length ...