Algorithm 문제풀이
[BOJ] 백준 1018 - 체스판 다시 칠하기 (JAVA)
cjsong
2019. 6. 4. 01:01
시뮬레이션 문제
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import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.StringTokenizer;
public class Main{
static String[] WStart = { "WBWBWBWB", "BWBWBWBW", "WBWBWBWB", "BWBWBWBW", "WBWBWBWB", "BWBWBWBW", "WBWBWBWB",
"BWBWBWBW" };
static String[] BStart = { "BWBWBWBW", "WBWBWBWB", "BWBWBWBW", "WBWBWBWB", "BWBWBWBW", "WBWBWBWB", "BWBWBWBW",
"WBWBWBWB" };
private static char[][] chess;
public static void main(String[] args) throws Exception {
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
StringTokenizer st = new StringTokenizer(br.readLine(), " ");
int N = Integer.parseInt(st.nextToken());
int M = Integer.parseInt(st.nextToken());
chess = new char[N + 1][M + 1];
for (int i = 0; i < N; i++) {
String str = br.readLine();
for (int j = 0; j < M; j++) {
chess[i][j] = str.charAt(j);
}
}
int minNum = Integer.MAX_VALUE;
for (int i = 0; i < N - 7; i++) {
for (int j = 0; j < M - 7; j++) {
minNum= min(minNum, Wcheck(WStart, i, j), Bcheck(BStart, i, j));
}
}
System.out.println(minNum);
}// end of main
public static int Wcheck(String[] WStart, int x, int y) {
int result= 0 ;
for (int i = x; i < x+8; i++) {
for (int j = y; j < y+8; j++) {
if(chess[i][j] == WStart[i-x].charAt(j-y)) result++;
}
}
return result;
}
public static int Bcheck(String[] BStart , int x , int y) {
int result= 0 ;
for (int i = x; i < x+8; i++) {
for (int j = y; j < y+8; j++) {
if(chess[i][j] == BStart[i-x].charAt(j-y)) result++;
}
}
return result;
}
public static int min(int a, int b, int c) {
int result= 0;
result = a < b ? (a < c ? a : c) : (b < c ? b : c);
return result;
}
}// end of class
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