Created
July 31, 2014 12:50
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import java.util.*; | |
public class Mouse { | |
/** | |
* @param args | |
*/ | |
private boolean found = false; | |
public int si, sj, ei, ej; | |
public boolean vist(char[][] bear, int i, int j, int R, int C){ | |
if (this.found) { | |
return true; | |
} | |
if (bear[i][j] == 'u') { | |
return this.found; | |
} | |
bear[i][j] = 'u'; | |
if(i == ei && j == ej){ | |
this.found = true; | |
} | |
if(j < C - 1 && bear[i][j+1] == '-') | |
vist(bear, i, j+1, R, C); | |
if(i < R - 1 && bear[i+1][j] == '-') | |
vist(bear, i+1, j, R, C); | |
if((j -1) >= 0 && bear[i][j-1] == '-') | |
vist(bear, i, j-1, R, C); | |
if((i - 1)>=0 && bear[i-1][j] == '-') | |
vist(bear, i-1, j, R, C); | |
return this.found; | |
} | |
public static void main(String[] args) { | |
// TODO Auto-generated method stub | |
Scanner scanner = new Scanner(System.in); | |
int R, C; | |
R = Integer.parseInt(scanner.nextLine()); | |
C = Integer.parseInt(scanner.nextLine()); | |
char[][] bear = new char[R][C]; | |
int i = 0; | |
Mouse m = new Mouse(); | |
for (int k = 0; k < R; k++) { | |
String s = scanner.next(); | |
char[] ss = s.toCharArray(); | |
for(int j = 0; j < C; j++){ | |
bear[i][j] = ss[j]; | |
if(bear[i][j] == 'B'){ | |
m.si = i; | |
m.sj = j; | |
} | |
if(bear[i][j] == 'H'){ | |
m.ei = i; | |
m.ej = j; | |
} | |
} | |
i++; | |
} | |
if(m.vist(bear, m.si, m.sj, R, C)) | |
System.out.println("Y"); | |
else | |
System.out.println("N"); | |
} | |
} |
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