Algorithm, boj, 디지털티비(2816)

package org.baekjoon;
import java.io.*;
public class test2816_greedy_digitalTv {
	public static void main(String[] args) throws IOException {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		int N = Integer.parseInt(br.readLine());
		int[] k = new int[2];
		for (int i=0; i<N ; i++) {
			String channel = br.readLine();
			if(channel.equals("KBS1"))
				k[0] = i;
			else if(channel.equals("KBS2"))
				k[1] = i;
		}
		// kbs2, kbs1 순서이면 kbs1이 올라가면서 kbs2를 아래로 한칸 내린다
		if(k[0] > k[1]) k[1]++;
		for(int i=0; i<2; i++) {
			for(int j=0; j<k[i]; j++) {
				System.out.print("1");
			}
			if(i==1) k[1]--;
			for(int j=0; j<k[i]; j++) {
				System.out.print("4");
			}
		}
	}
}