The Instant View Editor uses a three-column layout, so you really want to use it on a desktop screen that's wide enough. Sorry for the inconvenience.

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Codeforces Round #450(Div. 2). Editorial.
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Issue #1

Daniel L
Some stuff were supposed to be loaded but weren't. Cheers.
Accepted by admin
Type of issue
Submitted via the Previews bot
Reported
Dec 11, 2017