mintzberg

<p>저는 set으로 해봤는데 map으로 하는 방법도 있었네요</p><pre><code>import java.util.HashSet;
import java.util.Scanner;

public class Main {
    public String solutions(String str) {
        StringBuilder answer = new StringBuilder();
        char[] x = str.toCharArray();
        HashSet<Character> unique = new HashSet<>();
        for (char c : x) {
            if (unique.add(c)) {
                answer.append(c);
            }
        }
        return answer.toString();
    }

    public static void main(String[] args) {
        Main t = new Main();
        Scanner sc = new Scanner(System.in);
        String str = sc.next();
        System.out.println(t.solutions(str));
    }
}</code></pre><p>&nbsp;</p>

mintzberg

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