LeetCode Keys and Rooms Solution Explained - Java

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#coding #programming #softwareengineering
  1. Nick White
  2. leetcode
  3. algorithms
  4. data structures
  5. coding
  6. keys and rooms
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Комментарии
Автор

why dont use hashset? if hashset size < n, false.

mikexue
Автор

BFS Solution:
class Solution {
public boolean rooms) {
Set<Integer> visited = new HashSet<>();

Queue<Integer> queue = new LinkedList<>();
queue.add(0);
while(!queue.isEmpty()) {
int room = queue.poll();
if(!visited.contains(room)) {
visited.add(room);
List<Integer> keys = rooms.get(room);
queue.addAll(keys);
}
}

return visited.size() == rooms.size();
}
}

KiranVuyyuru
Автор

When i think you cant have worst explanations..there you are.

alxx
Автор

I am wondering how keys.add worked with stack....it's .push with stack

rupaldesai