Олег Давыдов (Редактор отдела «Интернет и СМИ»)
Solutions should compile. Submissions which don't compile are still allowed, but points will be deducted.
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The tree behind the grid，这一点在体育直播中也有详细论述
These aren't contrived scenarios invented by test authors in total vacuum. They're consequences of the spec's design and reflect real world bugs.