Pangrams Problem HacerRank

 A pangram is a string that contains every letter of the alphabet. Given a sentence determine whether it is a pangram in the English alphabet. Ignore case. Return either pangram or not pangram as appropriate.

Example

The string contains all letters in the English alphabet, so return pangram.

Function Description

Complete the function pangrams in the editor below. It should return the string pangram if the input string is a pangram. Otherwise, it should return not pangram.

pangrams has the following parameter(s):

• string s: a string to test

Returns

• string: either pangram or not pangram

Input Format

A single line with string .

Constraints

Each character of , 

Sample Input

Sample Input 0

We promptly judged antique ivory buckles for the next prize

Sample Output 0

pangram

Sample Explanation 0

All of the letters of the alphabet are present in the string.

Sample Input 1

We promptly judged antique ivory buckles for the prize

Sample Output 1

not pangram

Sample Explanation 0

The string lacks an x.

Solution :

import java.io.*;

import java.math.*;

import java.security.*;

import java.text.*;

import java.util.*;

import java.util.concurrent.*;

import java.util.regex.*;

class Result {

    /*

     * Complete the 'pangrams' function below.

     *

     * The function is expected to return a STRING.

     * The function accepts STRING s as parameter.

     */

    public static String pangrams(String s) {

    // Write your code here

   

    if (s.length() < 26) return "not pangram"; // Short sentences can't be pangrams

   

String str = s.toLowerCase();

char [] ch = str.toCharArray();

HashSet<Character> set = new HashSet<>();

for(char c:ch)

{

    if(Character.isLetter(c))

    {

        set.add(c);

    }

   

}

return set.size()==26 ? "pangram" : "not pangram";

   

   

 

    }

}

public class Solution {

    public static void main(String[] args) throws IOException {

        BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(System.in));

        BufferedWriter bufferedWriter = new BufferedWriter(new FileWriter(System.getenv("OUTPUT_PATH")));

        String s = bufferedReader.readLine();

        String result = Result.pangrams(s);

        bufferedWriter.write(result);

        bufferedWriter.newLine();

        bufferedReader.close();

        bufferedWriter.close();

    }

}