HackerRank in a String! 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 ProblemHackerRank in a String! – Hacker Rank Solution

HackerRank in a String! – Hacker Rank Solution

Problem:

We say that a string contains the word hackerrank if a subsequence of its characters spell the word hackerrank. Remeber that a subsequence maintains the order of characters selected from a sequence.

More formally, let  be the respective indices of hackerrank in string . If  is true, then  contains hackerrank.

For each query, print YES on a new line if the string contains hackerrank, otherwise, print NO.

Example

This contains a subsequence of all of the characters in the proper order. Answer YES

This is missing the second ‘r’. Answer NO.

There is no ‘c’ after the first occurrence of an ‘a’, so answer NO.

Function Description

Complete the hackerrankInString function in the editor below.

hackerrankInString has the following parameter(s):

  • string s: a string

Returns

  • string: YES or NO

Input Format

The first line contains an integer , the number of queries.
Each of the next  lines contains a single query string .

Constraints

Sample Input 0

2
hereiamstackerrank
hackerworld

Sample Output 0

YES
NO

Explanation 0

We perform the following  queries:


  1. The characters of hackerrank are bolded in the string above. Because the string contains all the characters in hackerrank in the same exact order as they appear in hackerrank, we return YES.
  2.  does not contain the last three characters of hackerrank, so we return NO.

Sample Input 1

2
hhaacckkekraraannk
rhbaasdndfsdskgbfefdbrsdfhuyatrjtcrtyytktjjt

Sample Output 1

YES
NO
HackerRank in a String! – Hacker Rank Solution
import java.util.Scanner;
public class LCS {
    public static void main(String[] args) throws Exception {
        Scanner scan = new Scanner(System.in);
        int q = scan.nextInt();
        while (q-- > 0) {
            String s1 = scan.next();
            String s2 = "hackerrank";
            int m = s1.length();
            int n = s2.length();
            char a[] = s1.toCharArray();
            char b[] = s2.toCharArray();
            int c[][] = new int[n + 1][m + 1];
            for (int i = 1; i <= n; i++) {
                for (int j = 1; j <= m; j++) {
                    if (b[i - 1] == a[j - 1]) {
                        c[i][j] = c[i - 1][j - 1] + 1;
                    } else {
                        c[i][j] = Math.max(c[i - 1][j], c[i][j - 1]);
                    }
                }
            }
            int count = c[n][m];
            if(count == n) {
                System.out.println("YES");
            } else {
                System.out.println("NO");
            }
        }
    }
}

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