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Solution.java
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class Solution {
private boolean[][] vis;
private int[][] maze;
private int[] d;
private int m;
private int n;
public boolean hasPath(int[][] maze, int[] start, int[] destination) {
m = maze.length;
n = maze[0].length;
d = destination;
this.maze = maze;
vis = new boolean[m][n];
dfs(start[0], start[1]);
return vis[d[0]][d[1]];
}
private void dfs(int i, int j) {
if (vis[i][j]) {
return;
}
vis[i][j] = true;
if (i == d[0] && j == d[1]) {
return;
}
int[] dirs = {-1, 0, 1, 0, -1};
for (int k = 0; k < 4; ++k) {
int x = i, y = j;
int a = dirs[k], b = dirs[k + 1];
while (x + a >= 0 && x + a < m && y + b >= 0 && y + b < n && maze[x + a][y + b] == 0) {
x += a;
y += b;
}
dfs(x, y);
}
}
}