Petrozavodsk Programming Camp Winter 2020 Day 2: Greetings from Japan

	#	タイトル
A	18210	Fast Forwarding
B	18211	Estimating the Flood Risk
C	18212	Wall Painting
D	18213	Twin Trees Bros.
E	18214	Reordering the Documents
F	18215	Halting Problem
G	18216	Ambiguous Encoding
H	18217	Parentheses Editor
I	18218	One-Way Conveyors
J	18219	Fun Region
K	18220	Draw in Straight Lines