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

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Algorithm Hackerrank Solution | Hackerrank Java Solution

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 Gemstones 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 Problem – Gemstones – Hacker Rank Solution 

Gemstones – Hacker Rank Solution

Problem:

There is a collection of rocks where each rock has various minerals embeded in it. Each type of mineral is designated by a lowercase letter in the range . There may be multiple occurrences of a mineral in a rock. A mineral is called a gemstone if it occurs at least once in each of the rocks in the collection.

Given a list of minerals embedded in each of the rocks, display the number of types of gemstones in the collection.

Example

The minerals  and  appear in each rock, so there are  gemstones.

Function Description

Complete the gemstones function in the editor below.

gemstones has the following parameter(s):

  • string arr[n]: an array of strings

Returns

  • int: the number of gemstones found

Input Format

The first line consists of an integer , the size of .
Each of the next  lines contains a string  where each letter represents an occurence of a mineral in the current rock.

Constraints


 | arr[i] | 
Each composition  consists of only lower-case Latin letters (‘a’-‘z’).

Sample Input

STDIN       Function
-----       --------
3           arr[] size n = 3
abcdde      arr = ['abcdde', 'baccd', 'eeabg']
baccd
eeabg

Sample Output

2

Explanation

Only  and  occur in every rock.

Gemstones – Hacker Rank Solution
import java.util.Scanner;
public class Solution {
    
    public static void main(String[] args) {
        int N;
        Scanner in = new Scanner(System.in);
        N = in.nextInt();
        String s;
        int[] count = new int[26];
        int[] temp;
        for (int i = 0; i < N; i++) {
            temp = new int[26];
            s = in.next();
            for (char c : s.toCharArray()) {
                temp[c - 97] += 1;
                if (temp[c - 97] == 1)
                    count[c - 97] += 1;
            }
            temp = null;
        }
        int sum = 0;
        for (int i = 0; i < 26; i++) {
            if (count[i] == N)
                sum += 1;
        }
        count = null;//garabage collector
        System.out.println(sum);
    }
}

126 thoughts on “Gemstones in Algorithm | HackerRank Programming Solutions | HackerRank Problem Solving Solutions in Java [💯Correct]”

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