841. Keys and Rooms
841. Keys and Rooms
透過拿到的鑰匙來造訪後面的房間，是圖形搜索的一種問題。
class Solution:
def canVisitAllRooms(
Graph
1466. Reorder Routes to Make All Paths Lead to the City Zero
1466. Reorder Routes to Make All Paths Lead to the
1584. Min Cost to Connect All Points
這一題如果不用 UnionFind 的確會有點難做。
class UnionFind:
def __init__(self, size):
self.
UnionFind
Quick Find
class UnionFind:
def __init__(self, size):
self.root
1091. Shortest Path in Binary Matrix
1091. Shortest Path in Binary Matrix
可以先練習這些題目
* 200. Number of
787. Cheapest Flights Within K Stops
787. Cheapest Flights Within K Stops
這一題的考點
1. 在 BFS
399. Evaluate Division
399. Evaluate Division
class Solution:
def calcEquation(self, equations: List[
1202. Smallest String With Swaps
1202. Smallest String With Swaps
這個題目難在要怎麼想到使用 Graph 的實作來做。
題目給定的 pairs
1101. The Earliest Moment When Everyone Become Friends
1101. The Earliest Moment When Everyone Become Friends
這個題目是我認為很好的一道面試題，因為題目的情景很貼近日常生活，
797. All Paths From Source to Target
797. All Paths From Source to Target
class Solution:
def