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Union Find in Python
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| class UnionFind: | |
| def __init__(self, n): | |
| self.par = range(n) | |
| self.rank = [0 for i in xrange(n)] | |
| def find(self, x): | |
| if self.par[x] == x: | |
| return x | |
| self.par[x] = self.find(self.par[x]) | |
| return self.par[x] | |
| def same(self, x, y): | |
| return self.find(x) == self.find(y) | |
| def union(self, x, y): | |
| x = self.find(x) | |
| y = self.find(y) | |
| if x == y: | |
| return | |
| if self.rank[x] < self.rank[y]: | |
| self.par[x] = y | |
| else: | |
| self.par[y] = x | |
| if self.rank[x] == self.rank[y]: | |
| self.rank[x] += 1 |
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