Union Find | Disjoint Set Union | Set Size
Prereq: Disjoint Set Union Review
For this problem we now ask you to do something similar to the introductory problem, but this time instead of checking whether or not 2 values belong to the same set, we want to know the size of the set that a value belongs to. Therefore, we now support a different set of 2 operations:
merge(x, y)
merge the sets thatx
andy
belong to,count(x)
returns the size of the set thatx
belongs to.
Example:
1merge(1, 2)
2merge(2, 3)
3count(3) => 3
4count(4) => 1
Explanation:
We merge elements 1 and 2 then we merge the set of 1 and 2 with the element 3,
so we should have now have 2 sets, [1, 2, 3]
and [4]
.
Therefore the set that 3
belongs to contains 3 elements,
while the set that 4
belongs to contains 1 element.
Solution
Title
Script
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Ipsum
has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book.
Contrary to popular belief, Lorem
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is not simply random text.
1 >>> a = [1, 2, 3] 2 >>> a[-1] 3 3