Codeforces 835C - Star sky 【预处理二维前缀和】
C. Star skytime limit per test2 secondsmemory limit per test256 megabytesinputstandard inputoutputstandard outputThe Cartesian coordinate system is set in the sky. There you can see n stars, the i-th ...
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2018-07-14 11:00:49 ·
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