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Hash Tables: Ransom Note Hackerrank Solution - java | Hackerrank

 Hash Tables: Ransom Note Hackerrank Solution - java


For Explanation Watch Video :




Code :

import java.io.*;
import java.math.*;
import java.security.*;
import java.text.*;
import java.util.*;
import java.util.concurrent.*;
import java.util.function.*;
import java.util.regex.*;
import java.util.stream.*;
import static java.util.stream.Collectors.joining;
import static java.util.stream.Collectors.toList;

class Result {

    /*
     * Complete the 'checkMagazine' function below.
     *
     * The function accepts following parameters:
     *  1. STRING_ARRAY magazine
     *  2. STRING_ARRAY note
     */

    public static void checkMagazine(List<String> magazine, List<String> note) {
        //two times three is not four
        //two times two is four
        HashMap<String,Integer> hm = new HashMap<>();
        for(int i=0;i<magazine.size();i++){
            String s = magazine.get(i);
            hm.put(s,hm.getOrDefault(s,0)+1);
        }
        for(int i=0;i<note.size();i++){
            String s = note.get(i);
            if(hm.containsKey(s) && hm.get(s)!=0){
                hm.put(s,hm.get(s)-1);
            }else{
                System.out.println("No");
                return;
            }
        }
        System.out.println("Yes");
    }

}

public class Solution {
    public static void main(String[] args) throws IOException {
        BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(System.in));

        String[] firstMultipleInput = bufferedReader.readLine().replaceAll("\\s+$""").split(" ");

        int m = Integer.parseInt(firstMultipleInput[0]);

        int n = Integer.parseInt(firstMultipleInput[1]);

        List<String> magazine = Stream.of(bufferedReader.readLine().replaceAll("\\s+$""").split(" "))
            .collect(toList());

        List<String> note = Stream.of(bufferedReader.readLine().replaceAll("\\s+$""").split(" "))
            .collect(toList());

        Result.checkMagazine(magazine, note);

        bufferedReader.close();
    }
}

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