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Prime DistanceTime Limit:1000MSMemory Limit:65536KTotal Submissions:9944Accepted:2677DescriptionThe branch of mathematics called number theory is about properties of numbers. One of the areas that has captured the interest of number theoreticians for thousands of years is the question of primality. 阅读全文
摘要：
Summer Earningstime limit per test9 secondsmemory limit per test256 megabytesinputstandard inputoutputstandard outputMany schoolchildren look for a job for the summer, and one day, when Gerald was still a schoolboy, he also decided to work in the summer. But as Gerald was quite an unusual schoolboy, 阅读全文
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That Nice Euler CircuitLittle Joey invented a scrabblemachine that he called Euler, after the great mathematician. In his primary school Joey heard about the nice story of how Euler started the study about graphs. The problem in that story was - let me remind you - to draw a graph on a paper without 阅读全文
摘要：
Morley's TheoremMorley’s Theorem Input:Standard InputOutput:Standard OutputMorley’s theorem states that that the lines trisecting the angles of an arbitrary plane triangle meet at the vertices of an equilateral triangle. For example in the figure below the tri-sectors of angles A, B and C has in 阅读全文
