Volume 78 (7,800-7,899)

Problem ID	Title	Solution by	Most Popular Input by
7815	Tax	Morass	Morass
7816	Key Maker	Add Solution	--
7817	IOI 2017 Logo	Add Solution	--
7818	MicroRNA Ranking	Add Solution	--
7819	Mobius Strip	Add Solution	--
7820	Expression	Add Solution	--
7821	Elections	Morass	Add input
7822	Explosion at Cafebazaar	Add Solution	--
7823	Linear Galaxy	Add Solution	--
7824	Rahyab	Add Solution	--
7825	Base Stations	Add Solution	--
7826	Skeletons	Add Solution	--
7827	WSI Extreme	Add Solution	--
7828	Average	Add Solution	--
7829	Big Bang	Add Solution	--
7830	Find C	Add Solution	--
7831	ACM Tax	Add Solution	--
7832	Dictionary Game	Add Solution	--
7833	Binary Strings	Add Solution	--
7834	Witcher Potion	Add Solution	--
7835	Sky Tax	Add Solution	--
7836	Printing Press	Add Solution	--
7837	Expected Number of Connected Components	Add Solution	--
7838	Coordinates	Add Solution	--
7886	Assigning Teams	feodorv	feodorv
7887	Back to the Future	Morass	Add input
7888	Counting Self-Rotating Subsets	Add Solution	--
7889	Dating On-line	Add Solution	--
7890	Emission Spectrum	Add Solution	--
7891	Farm Robot	Add Solution	--
7892	Game of Matchings	Morass	Add input
7893	Hotel Rewards	Add Solution	--
7894	Internet Trouble	Add Solution	--
7895	Just in Time	feodorv	feodorv
7896	Kill the Werewolf	Add Solution	--
7897	Number Theory Problem	feodorv	feodorv
7898	Hemi Palindrome	Add Solution	--
7899	Mr. Panda and Strips	Morass	Morass