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목록round 420 (2)
http://codeforces.com/contest/821/problem/C C. Okabe and Boxestime limit per test3 secondsmemory limit per test256 megabytesinputstandard inputoutputstandard outputOkabe and Super Hacker Daru are stacking and removing boxes. There are n boxes numbered from 1 to n. Initially there are no boxes on the stack.Okabe, being a control freak, gives Daru 2n commands: n of which are to add a box to the to..
http://codeforces.com/contest/821/problem/B B. Okabe and Banana Treestime limit per test2 secondsmemory limit per test256 megabytesinputstandard inputoutputstandard outputOkabe needs bananas for one of his experiments for some strange reason. So he decides to go to the forest and cut banana trees.Consider the point (x, y) in the 2D plane such that x and y are integers and 0 ≤ x, y. There is a tr..