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C1. Brain Network (easy) time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output One particularly well-known fact about zombi

C2. Brain Network (medium) time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output Further research on zombie thought process

C. Alyona and the Tree time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output Alyona decided to go on a diet and went to the

A. NP-Hard Problem time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output Recently, Pari and Arya did some researc

D. Design Tutorial: Inverse the Problem time limit per test2 seconds memory limit per test256 megabytes inputstandard input outputstandard output There is an easy way to obtain a new task from an

B. Bakery time limit per test2 seconds memory limit per test256 megabytes inputstandard input outputstandard output Masha wants to open her own bakery and bake muffins in one of the n cities numbe

ZS the Coder and Chris the Baboon has explored Udayland for quite some time. They realize that it consists of n towns numbered from 1 to n.There are n directed roads in the Udayland. i-th of them goes