A POI12 problem

Правка en1, от EternalFire, 2018-07-15 10:09:54

https://szkopul.edu.pl/problemset/problem/eC-cABL-jWd4JdZDmfWufeeQ/site/?key=statement

I think this problem can be solved using graph matching. But I am stuck when trying to create such graph.

Could anyone help me ? Thanks.

Sorry for bad English

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en1 Английский EternalFire 2018-07-15 10:09:54 269 Initial revision (published)