Merge pull request #79 from tiationg-kho/update

update

Author: tiationg-kho

[K]graph/graph.md

@@ -116,6 +116,13 @@ class UnionFind:
  self.parent[p] = self.parent[self.parent[p]]
  p = self.parent[p]
  return p
+ 
+ '''
+ def find(self, p):
+ if p != self.parent[p]:
+ self.parent[p] = self.find(self.parent[p])
+ return self.parent[p]
+ '''
 
  # union by rank
  def union(self, p, q):