카카오신입공채 코딩테스트 1차(JAVA)

KakaoTest1.java

package com.jacknie.doodle.kakao;

import java.util.Arrays;

public class KakaoTest1 {

	public static void main(String[] args) {
		String[] r1 = decryptMap(5, new int[] {9, 20, 28, 18, 11}, new int[] {30, 1, 21, 17, 28});
		String[] r2 = decryptMap(6, new int[] {46, 33, 33, 22, 31, 50}, new int[] {27, 56, 19, 14, 14, 10});
		System.out.println(Arrays.toString(r1));
		System.out.println(Arrays.toString(r2));
	}
	
	static String[] decryptMap(int n, int[] arr1, int[] arr2) {
		String[] map = new String[n];
		for (int i = 0; i < n; i++) {
			int row = arr1[i] | arr2[i];
			map[i] = toMapRowString(n, row);
		}
		return map;
	}
	
	private static String toMapRowString(int n, int row) {
		StringBuilder builder = new StringBuilder("\"");
		for (int i = n - 1; i >= 0; i--) {
			int mask = (int) Math.pow(2, i);
			if (((row & mask) >> i) == 1) {
				builder.append("#");
			}
			else {
				builder.append(" ");
			}
		}
		return builder.append("\"").toString();
	}
}