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| class Solution {
private boolean[] flag;
public boolean canVisitAllRooms(List<List<Integer>> rooms) {
flag = new boolean[rooms.size()];
visit(rooms, 0);
return canVisit();
}
private boolean canVisit() {
for (boolean b : flag) {
if (!b) {
return false;
}
}
return true;
}
private void visit(List<List<Integer>> rooms, int number) {
flag[number] = true;
for (int n : rooms.get(number)) {
if (flag[n]) {
continue;
}
visit(rooms, n);
}
}
}
|
