Big Sorting in Algorithm | HackerRank Programming Solutions | HackerRank Problem Solving Solutions in Java [💯Correct]

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Introduction To Algorithm

The word Algorithm means “a process or set of rules to be followed in calculations or other problem-solving operations”. Therefore Algorithm refers to a set of rules/instructions that step-by-step define how a work is to be executed upon in order to get the expected results. 

Advantages of Algorithms:

• It is easy to understand.
• Algorithm is a step-wise representation of a solution to a given problem.
• In Algorithm the problem is broken down into smaller pieces or steps hence, it is easier for the programmer to convert it into an actual program.

Link for the Problem – Big Sorting– Hacker Rank Solution

Big Sorting – Hacker Rank Solution

Problem:

Consider an array of numeric strings where each string is a positive number with anywhere from  to  digits. Sort the array’s elements in non-decreasing, or ascending order of their integer values and return the sorted array.

Example

Return the array [‘1’, ‘3’, ‘150’, ‘200’].

Function Description

Complete the bigSorting function in the editor below.

bigSorting has the following parameter(s):

• string unsorted[n]: an unsorted array of integers as strings

Returns

• string[n]: the array sorted in numerical order

Input Format

The first line contains an integer, , the number of strings in .
Each of the  subsequent lines contains an integer string, .

Constraints

• Each string is guaranteed to represent a positive integer.
• There will be no leading zeros.
• The total number of digits across all strings in  is between  and  (inclusive).

Sample Input 0

6
31415926535897932384626433832795
1
3
10
3
5

Sample Output 0

1
3
3
5
10
31415926535897932384626433832795

Explanation 0

The initial array of strings is . When we order each string by the real-world integer value it represents, we get:

We then print each value on a new line, from smallest to largest.

Sample Input 1

8
1
2
100
12303479849857341718340192371
3084193741082937
3084193741082938
111
200

Sample Output 1

1
2
100
111
200
3084193741082937
3084193741082938
12303479849857341718340192371

Big Sorting – Hacker Rank Solution

import java.util.Arrays;
import java.util.Comparator;
import java.util.Scanner;

/**
 * @author Techno-RJ
 *
 */
public class BigSorting {
	public static void main(String[] args) {
		Scanner in = new Scanner(System.in);
		int n = in.nextInt();
		String[] unsorted = new String[n];
		for (int unsorted_i = 0; unsorted_i < n; unsorted_i++) {
			unsorted[unsorted_i] = in.next();
		}

		Arrays.sort(unsorted, new Comparator<String>() {

			public int compare(String s1, String s2) {
				return compareStrings(s1, s2);
			}
		});
		printArray(unsorted);
		in.close();
	}

	private static int compareStrings(String s1, String s2) {
		if (s1.length() < s2.length()) {
			return -1;
		} else if (s1.length() > s2.length()) {
			return 1;
		}
		for (int k = 0; k < s1.length(); k++) {
			if ((int) s1.charAt(k) < (int) s2.charAt(k))
				return -1;
			if ((int) s1.charAt(k) > (int) s2.charAt(k))
				return 1;

		}
		return 0;

	}

	private static void printArray(String[] unsorted) {

		for (String string : unsorted) {
			System.out.println(string);
		}

	}

}