백준 10026번) 적록색약

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class Main {
	static int N;
	static char[][] map;

	static void DFS(char color, int r, int c, boolean[][] visited) {
		if (r < 0 || r >= N)
			return;
		if (c < 0 || c >= N)
			return;
		if (map[r][c] != color)
			return;
		if (visited[r][c])
			return;
		System.out.println(r+":"+c);
		visited[r][c] = true;
		DFS(color, r - 1, c, visited);
		DFS(color, r + 1, c, visited);
		DFS(color, r, c - 1, visited);
		DFS(color, r, c + 1, visited);
	}

	static int areaCount() {
		boolean[][] visited = new boolean[N][N];
		int count = 0;
		for (int r = 0; r < N; ++r)
			for (int c = 0; c < N; ++c)
				if (visited[r][c] == false) {
					++count;
					char color = map[r][c];
					DFS(color, r, c, visited);
				}
		return count;
	}

	public static void main(String[] args) throws NumberFormatException, IOException {
		BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
		N = Integer.parseInt(reader.readLine());
		map = new char[N][];
		for (int i = 0; i < N; ++i)
			map[i] = reader.readLine().toCharArray();
		int count1 = areaCount();
		for (int r = 0; r < N; ++r)
			for (int c = 0; c < N; ++c)
				if (map[r][c] == 'R')
					map[r][c] = 'G';
		int count2 = areaCount();
		System.out.println(count1 + " " + count2);
	}
}