백준 11652

▶11652번 문제 - 좌표 정렬하기2

 

▶풀이방법

import java.io.*;
import java.util.*;
public class Main{
	public static void main(String[] args) throws IOException{
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(System.out));
		
		int count = Integer.parseInt(br.readLine());
		long[] arr = new long[count];
		
		for(int i = 0; i < count; i++) {
			arr[i] = Long.parseLong(br.readLine());
		}
		Arrays.sort(arr);
		
		int cnt = 1, max = 1, num = 0;
		for(int i = 1; i < count; i++) {
			if(arr[i-1] == arr[i]) cnt++;
			else {
				cnt = 1;
			}
			if(cnt > max) {
				max = cnt;
				num = i;
			}
		}
		
		bw.write(String.valueOf(arr[num]));
		bw.flush();
		bw.close();
		br.close();
	}
}

 

++ 오류 발생 후 고친과정(왜 틀렸었는지 정확히 알아두기!)