Editorial for DMOPC '15 Contest 3 P3 - Dimethylbenzene

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Author: Xyene

Knowledge required: DFS or for loops

This problem involves a graph of a molecule — however, this does not mean it requires any knowledge of graph theory to solve! Since the bounds are small (up to $20$ ~20~ atoms and bonds), one does not have to implement a functional graph traversal: seven nested for loops work.

Remember that a bond between $u$ ~u~ and $v$ ~v~ implies a bond between $v$ ~v~ and $u$ ~u~.

Time Complexity: $\mathcal{O}(N^7)$ ~\mathcal{O}(N^7)~

Comments

15

pro commented on Nov. 23, 2017, 2:58 p.m.

DOES TIME COMPLEXITY NOT EXIST IN THIS PROBLEM?!!!O(N^7)???!!!!!