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Big O Notation is an informal name of the "O(x)" notation used to describe asymptotic behaviour of functions. It is a special case of Landau notation, where the O is the Greek letter capital omicron. Please consider using the [landau-notation] tag instead if your question is related to small omicron, omega, or theta in Landau notation.
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Time Complexity of Backtracking solution to Leetcode 473. Matchsticks to Square
The following is a Leetcode problem: 473. Matchsticks to Square (https://leetcode.com/problems/matchsticks-to-square/description/)
Problem Statement
You have an array, matchsticks, of size n, with di …