[Java] 2812 크게 만들기

https://www.acmicpc.net/problem/2812

2812번: 크게 만들기

[틀린 코드]

- 정렬해서 K개만큼 빼주면 될 줄 알았던 나 자신을 반성

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.Arrays;
import java.util.StringTokenizer;
 
public class bj2812 {
 
    static int N,K;
    static Integer[] original;
    static Integer[] arr;
    static Integer[] delete;
    public static void main(String[] args) throws IOException {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        StringTokenizer st=  new StringTokenizer(br.readLine(), " ");
        StringBuilder sb = new StringBuilder();
        N = Integer.parseInt(st.nextToken());
        K = Integer.parseInt(st.nextToken());
        arr = new Integer[N];
 
        String str = br.readLine();
        for(int i=0;i<N;i++){
            arr[i]= Integer.parseInt(Character.toString(str.charAt(i)));
        }
        original = Arrays.copyOf(arr, arr.length);
        Arrays.sort(arr);
        delete = Arrays.copyOfRange(arr,0,K);
        int cnt=0;
        for(Integer i : original){
            sb.append(i.toString());
        }
        String answer = sb.toString();
        for(int i=0;i<K;i++){
            String del = delete[i].toString();
            System.out.println(del);
            answer = answer.replaceFirst(del, "");
        }
        System.out.println(answer);
 
    }
 
 
}