EM-Tirupati Codeathon Series #04

[Question]

Java Advanced — Lambda Expressions [www.techgig.com]

Write the Following Methods that Return a Lambda Expression Performing a Specified Action: Perform Operation is Odd(): The Lambda Expression must return if a Number is Odd or If it is Even. Perform Operation is Prime(): The lambda expression must return if a number is prime or if it is composite. Perform Operation is Palindrome(): The Lambda Expression must return if a number is a Palindrome or if it is not.

[Sample Input]

Input is as Show in the Format Below (Deduce Unknowns!)

Input

3

1 3

2 7

3 7777

Constraints

NA

[Sample output]

Output is as Show in the Format Below (Deduce Unknowns!)

Output

ODD

PRIME

PALINDROME

[Explanation of the Solution]

Here in this problem we need to consider first input as option and second input as number. According to the option we need to do Lambda operations for the number like(odd, prime, palindrome).

Github Repo for Code:https://github.com/em-tpt-kvijay/emt_codeathon_sep_2023_solutions/blob/master/src/codeathon/Codeathon04_vijay.java

[Solution (Java Code)]

package codeathon;

import java.util.ArrayList;

import java.util.List;

import java.util.Scanner;

import java.util.StringTokenizer;

interface  Operation{

    boolean check(int a);

}

class FindTheValue {

    public static boolean checker(Operation p, int num) {

        return p.check(num);

    }

    public static Operation is_odd() {

        return n -> (n & 1) == 1;

    }

    public static Operation is_prime() {

        return n -> {

            if (n < 2) {

                return false;

            }

            int sqrt = (int) Math.sqrt(n);

            for (int i = 2; i <= sqrt; i++) {

                if (n % i == 0) {

                    return false;

                }

            }

            return true;

        };

    }

    public static Operation is_palindrome() {

        return n -> {

            String original = Integer.toString(n);

            String reversed = new StringBuilder(Integer.toString(n)).reverse().toString();

            return original.equals(reversed);

        };

    }

}

public class codeathon04_vijay {

    public static void main(String[] args) {

        FindTheValue ob = new FindTheValue();

        Scanner scanner = new Scanner(System.in);

        int T = scanner.nextInt();

        Operation op;

        String ans = null;

        scanner.nextLine();

        List<String> results = new ArrayList<>();

        while (T-- > 0) {

            String s = scanner.nextLine().trim();

            StringTokenizer st = new StringTokenizer(s);

            int ch = Integer.parseInt(st.nextToken());

            int num = Integer.parseInt(st.nextToken());

            switch(ch)

            {

                case 1:

                    op = ob.is_odd();

                    ans = ob.checker(op, num) ? "ODD" : "EVEN";

                    results.add(ans);

                    break;

                case 2:

                    op = ob.is_prime();

                    ans = ob.checker(op, num) ? "PRIME" : "COMPOSITE";

                    results.add(ans);

                    break;

                case 3:

                    op = ob.is_palindrome();

                    ans = ob.checker(op, num) ? "PALINDROME" : "NOT PALINDROME";

                    results.add(ans);

                    break;

                default :

                    System.out.println("Enter vaild option for input "+ch+":"+num);

            }

        }

        scanner.close();

        for (String result : results) {

            System.out.println(result);

        }

    }

}

Thank you,

k.vijay(Intern)

vijay.keradhi@eminds.ai

Enterprise Minds.