[HackerRank] Day 8: Dictionaries and Maps

문제

https://www.hackerrank.com/challenges/30-dictionaries-and-maps/problem?h_r=next-challenge&h_v=zen&h_r=next-challenge&h_v=zen&h_r=next-challenge&h_v=zen&h_r=next-challenge&h_v=zen

Day 8: Dictionaries and Maps | HackerRank

문제 설명

맵을 이용해 푸는 문제

//맵 선언 방법
Map<String, Integer> phoneBook = new HashMap<String, Integer>();

 

성공 코드

class Solution{
    public static void main(String []argh){
        Scanner in = new Scanner(System.in);
        int n = in.nextInt();
        Map<String, Integer> phoneBook = new HashMap<String, Integer>();
 
        for(int i = 0; i < n; i++){
            String name = in.next();
            int phone = in.nextInt();
            // Map에 저장
            phoneBook.put(name, phone);
        }
        while(in.hasNext()){
            String s = in.next();
            // 전화부에 s가 있으면 번호 출력, 아니면 not found
            if (phoneBook.containsKey(s))
                System.out.println(s + "=" + phoneBook.get(s));
            else
                System.out.println("Not found");
        }
        in.close();
    }
}