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{"id":34746,"date":"2024-11-01T09:31:31","date_gmt":"2024-11-01T09:31:31","guid":{"rendered":"http:\/\/atmokpo.com\/w\/?p=34746"},"modified":"2024-11-01T11:26:43","modified_gmt":"2024-11-01T11:26:43","slug":"swift-coding-test-course-finding-the-building-order","status":"publish","type":"post","link":"https:\/\/atmokpo.com\/w\/34746\/","title":{"rendered":"Swift Coding Test Course, Finding the Building Order"},"content":{"rendered":"

<\/p>\n

Hello! Today we will learn about one of the problems frequently encountered in Swift coding tests, ‘Finding the Order of Building’. This problem will provide a good opportunity to lay the foundation of algorithms through the process of finding the order to construct buildings based on specific conditions.<\/p>\n

Problem Definition<\/h2>\n

This problem involves returning a possible order of construction for given building information. The buildings must satisfy specific conditions, which are as follows:<\/p>\n

Each building has a unique height.<\/li>\n
If a taller building is constructed first, any building taller than that must be constructed afterwards.<\/li>\n

The order of the buildings must be sorted in descending order based on height.<\/li>\n<\/ul>\n

For example, if there are buildings with heights [5, 3, 4, 1], the possible order of the buildings will be [5, 4, 3, 1], and building 5 will be constructed first.<\/p>\n

Input and Output<\/h2>\n

Input<\/h3>\n
An integer array heights containing the heights of the buildings is given.<\/p>\n

Output<\/h3>\n
Returns the order of buildings that can be constructed in the form of an array based on height order.<\/p>\n

Problem Solving Approach<\/h2>\n

To solve this problem, the following steps are taken:<\/p>\n

Sort the given array of building heights in descending order.<\/li>\n
Traverse the sorted array and add values to the result array.<\/li>\n

Return the result array.<\/li>\n<\/ol>\n

Example<\/h2>\n

For example, if the input array is [5, 3, 4, 1]<\/code>, the result after sorting will be as follows:<\/p>\n

Input: [5, 3, 4, 1]\nOutput: [5, 4, 3, 1]\n<\/code><\/pre>\nSwift Code Implementation<\/h2>\nNow, let’s implement the above approach in Swift.<\/p>\n
func buildingOrder(heights: [Int]) -> [Int] {\n        return heights.sorted(by: >)\n    }\n\n    \/\/ Example usage\n    let heights = [5, 3, 4, 1]\n    let orderedBuildings = buildingOrder(heights: heights)\n    print(orderedBuildings) \/\/ Output: [5, 4, 3, 1]\n<\/code><\/pre>\nThe above code is a simple function that sorts the given heights array in descending order. It uses sorted(by: >)<\/code> to sort the array and returns the sorted result.<\/p>\n
Time Complexity Analysis<\/h2>\nThe time complexity of this algorithm is the same as that used for sorting the array, which is O(n log n). Here, n is the number of buildings. Since this problem is based on sorting, the time increases as the input size grows, but it can be considered an efficient method.<\/p>\n
Conclusion<\/h2>\nToday we explored the problem of finding the order to construct buildings using Swift. I hope this problem has helped to enhance your understanding of the fundamental concepts of algorithms and sorting. I encourage you to build your skills through more algorithmic challenges in the future!<\/p>\n
\nThis article was written as part of the Swift coding test course. I hope it helps you greatly in your job preparation!<\/p>\n<\/footer>\n
<\/body><\/p>\n","protected":false},"excerpt":{"rendered":"
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Input and Output<\/h2>\n

Input<\/h3>\nAn integer array heights containing the heights of the buildings is given.<\/p>\n

Output<\/h3>\nReturns the order of buildings that can be constructed in the form of an array based on height order.<\/p>\n

Input<\/h3>\n
An integer array heights containing the heights of the buildings is given.<\/p>\n

Output<\/h3>\n
Returns the order of buildings that can be constructed in the form of an array based on height order.<\/p>\n