Beautiful Binary String in Algorithm | HackerRank Programming Solutions | HackerRank Problem Solving Solutions in Java [💯Correct]

Hello Programmers/Coders, Today we are going to share solutions of Programming problems of HackerRank, Algorithm Solutions of Problem Solving Section in Java. At Each Problem with Successful submission with all Test Cases Passed, you will get an score or marks. And after solving maximum problems, you will be getting stars. This will highlight your profile to the recruiters.

In this post, you will find the solution for Beautiful Binary String in Java-HackerRank Problem. We are providing the correct and tested solutions of coding problems present on HackerRank. If you are not able to solve any problem, then you can take help from our Blog/website.

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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 ProblemBeautiful Binary String– Hacker Rank Solution

Beautiful Binary String – Hacker Rank Solution

Problem:

Alice has a binary string. She thinks a binary string is beautiful if and only if it doesn’t contain the substring .

In one step, Alice can change a  to a  or vice versa. Count and print the minimum number of steps needed to make Alice see the string as beautiful.

Example

She can change any one element and have a beautiful string.

Function Description

Complete the beautifulBinaryString function in the editor below.

beautifulBinaryString has the following parameter(s):

  • string b: a string of binary digits

Returns

  • int: the minimum moves required

Input Format

The first line contains an integer , the length of binary string.
The second line contains a single binary string .

Constraints

  • .

Output Format

Print the minimum number of steps needed to make the string beautiful.

Sample Input 0

STDIN       Function
-----       --------
7           length of string n = 7
0101010     b = '0101010'

Sample Output 0

2  

Explanation 0:

In this sample, 

The figure below shows a way to get rid of each instance of :

1462078460 7a0995ab28 binary

Make the string beautiful by changing  characters ( and ).

Sample Input 1

5
01100

Sample Output 1

0

Sample Case 1:

In this sample 

Explanation 1

The substring  does not occur in , so the string is already beautiful in  moves.

Sample Input 2

10
0100101010

Sample Output 2

3

Explanation 2

In this sample 

One solution is to change the values of  to form a beautiful string.

Beautiful Binary String– Hacker Rank Solution
import java.util.Scanner;

/**
 * @author Techno-RJ
 *
 */
public class BeautifulBinaryString {
	 static int minSteps(int n, String strB){
	        int stepsCount=0;
	        String tmpStr=strB;
	        while(tmpStr.indexOf("010")!=-1){
	        	tmpStr=tmpStr.replaceFirst("010", "011");
	        	stepsCount++;
	        }
	        return stepsCount;
	    }

	    public static void main(String[] args) {
	        Scanner in = new Scanner(System.in);
	        int n = in.nextInt();
	        String B = in.next();
	        int result = minSteps(n, B);
	        System.out.println(result);
	        in.close();
	    }
	}

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