Welcome to the Sorting and Searching Problems section of the Coding Problems lesson. In this section, we will explore various problems related to sorting and searching.

As a very senior engineer with intermediate knowledge of Java and Python, you have likely encountered sorting and searching algorithms in your programming journey. Sorting algorithms are used to arrange elements in a specific order, such as in ascending or descending order. Searching algorithms are used to find a specific element or determine if an element exists in a collection.

Understanding different sorting and searching algorithms and their time complexity can greatly improve your problem-solving skills and efficiency.

Let's start by examining a common sorting algorithm: Bubble Sort.

Bubble Sort is a simple sorting algorithm that repeatedly steps through the list, compares adjacent elements, and swaps them if they are in the wrong order. The pass through the list is repeated until the list is sorted.

Here's an example of Bubble Sort implemented in Java:

1public class Main {
2  public static void bubbleSort(int[] arr) {
3    int n = arr.length;
4    for (int i = 0; i < n-1; i++) {
5      for (int j = 0; j < n-i-1; j++) {
6        if (arr[j] > arr[j+1]) {
7          // swap arr[j] and arr[j+1]
8          int temp = arr[j];
9          arr[j] = arr[j+1];
10          arr[j+1] = temp;
11        }
12      }
13    }
14  }
15
16  public static void main(String[] args) {
17    int[] arr = {64, 34, 25, 12, 22, 11, 90};
18    bubbleSort(arr);
19    System.out.println("Sorted array: ");
20    for (int i = 0; i < arr.length; i++) {
21      System.out.print(arr[i] + " ");
22    }
23  }
24}

In this code, we define a class Main with a bubbleSort method that takes an array of integers as input and sorts it using the Bubble Sort algorithm. The sorted array is then printed using a for loop.

You can modify this code to solve different sorting and searching problems or explore other sorting and searching algorithms.

Happy coding!

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class Main {

  public static void main(String[] args) {

    // Write your Java code here

  }

}