Hello! In this tutorial, we will learn how to implement the Bubble Sort algorithm using the Kotlin language. Bubble Sort is one of the most basic sorting algorithms and is often featured as a fundamental problem in coding tests due to its simplicity. We will solve a problem together with detailed explanations.<\/p>\n
Write a program to sort a given integer array in ascending order. The length of the array is N (1 \u2264 N \u2264 1000), and each element is M (-104<\/sup> \u2264 M \u2264 104<\/sup>).<\/p>\n Bubble Sort is an algorithm that sorts by comparing two adjacent elements and swapping them if they are in the wrong order. This process is repeated, and thus the largest value moves to the end of the array, which is why it is called “Bubble.” The average and worst-case time complexity of Bubble Sort is O(N2<\/sup>).<\/p>\n Now let’s implement the algorithm in Kotlin:<\/p>\n The code above shows a basic implementation of Bubble Sort. The main function When the code is executed, it will output the following result:<\/p>\n The time complexity of Bubble Sort is O(N2<\/sup>). This is because, in the worst case, all elements need to be compared. However, in the best case (an already sorted array), the time complexity reduces to O(N). The space complexity is O(1).<\/p>\n The advantages and disadvantages of Bubble Sort are as follows:<\/p>\n Now let’s tackle a slightly more advanced problem based on the concepts we’ve covered. Remove duplicate elements from the given array and output the sorted result.<\/p>\n Write a program that takes an integer array as input, removes duplicate elements, and outputs the result sorted in ascending order.<\/p>\n When the above code is executed, the following result will be produced:<\/p>\n In this tutorial, we explored the Bubble Sort algorithm in detail, and through this, we solved basic sorting and duplicate removal problems. Although Bubble Sort is a simple and easy-to-understand algorithm, familiarizing yourself with various sorting algorithms that appear in coding tests will allow you to solve problems more effectively. In the next tutorial, we will cover more efficient sorting algorithms. Thank you!<\/p>\n <\/body><\/p>\n","protected":false},"excerpt":{"rendered":"Example<\/h3>\n
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Algorithm Explanation<\/h2>\n
Bubble Sort Algorithm<\/h3>\n
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Kotlin Implementation<\/h2>\n
\nfun bubbleSort(arr: IntArray): IntArray {\n val n = arr.size\n for (i in 0 until n - 1) { \n \/\/ The last i elements are already sorted, so repeat up to n-i-1.\n for (j in 0 until n - i - 1) {\n \/\/ Compare two adjacent elements\n if (arr[j] > arr[j + 1]) {\n \/\/ Swap\n val temp = arr[j]\n arr[j] = arr[j + 1]\n arr[j + 1] = temp\n }\n }\n }\n return arr\n}\n\nfun main() {\n val inputArray = intArrayOf(64, 34, 25, 12, 22, 11, 90)\n val sortedArray = bubbleSort(inputArray)\n println(\"Sorted array: ${sortedArray.joinToString(\", \")}\")\n}\n <\/code><\/pre>\nExplanation<\/h2>\n
bubbleSort<\/code> takes an integer array as input and returns the sorted array. It operates by using two nested loops to compare adjacent elements and swap them when necessary.<\/p>\nCode Execution Process<\/h3>\n
Sorted array: 11, 12, 22, 25, 34, 64, 90<\/code><\/pre>\nComplexity Analysis<\/h2>\n
Advantages and Disadvantages of Bubble Sort<\/h3>\n
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Application Problem<\/h2>\n
Problem Definition<\/h3>\n
Example<\/h3>\n
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Code Implementation<\/h2>\n
\nfun removeDuplicatesAndSort(arr: IntArray): IntArray {\n return arr.distinct().toIntArray().let { bubbleSort(it) }\n}\n\nfun main() {\n val inputArray = intArrayOf(64, 34, 25, 25, 12, 22, 11, 90, 90)\n val resultArray = removeDuplicatesAndSort(inputArray)\n println(\"Array after removing duplicates and sorting: ${resultArray.joinToString(\", \")}\")\n}\n <\/code><\/pre>\nResult<\/h2>\n
Array after removing duplicates and sorting: 11, 12, 22, 25, 34, 64, 90<\/code><\/pre>\nConclusion<\/h2>\n