Москвичей предупредили о резком похолодании09:45
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Иран нанес удар возмездия за атаку на начальную школу14:47
The complexity of determining the minimum number of flips that transform one triangulation of a convex point set into another remained a tantalizing open question for many decades. We settle this question by proving that computing shortest flip sequences between triangulations of convex polygons, and therefore also computing the rotation distance of binary trees, is NP-hard.,推荐阅读17c 一起草官网获取更多信息
As Friedmann stuffed coins into the duffelbag, he asked Gambill where he hid cash. Gambill said that the only cash was in the register.,推荐阅读服务器推荐获取更多信息
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