hqf1992的专栏

Stripies Our chemical biologists have invented anew very useful form of life called stripies (in fact, they were first calledin Russian - polosatiki, but the scientists had to invent an English na

EntropyDescriptionAn entropy encoderis a data encoding method that achieves lossless data compression by encoding amessage with "wasted" or "extra" information removed. Inother words, entropy enco

PacketsDescriptionA factory producesproducts packed in square packets of the same height h and of the sizes 1*1,2*2, 3*3, 4*4, 5*5, 6*6. These products are always delivered to customers inthe squa

Radar InstallationDescriptionAssume thecoasting is an infinite straight line. Land is in one side of coasting, sea inthe other. Each small island is a point locating in the sea side. And any radar

Tian Ji -- The Horse RacingDescriptionHere is a famousstory in Chinese history. That was about2300 years ago. General Tian Ji was a high official in the country Qi. He likesto play horse racing

New Year BonusGrant All programmers of Mocrosoft softwarecompany are organized in a strict subordination hierarchy. Every programmer hasexactly one chief, except Bill Hates who is also the head of

Elevator Stopping PlanDescriptionZSoft Corp. is asoftware company in GaoKe Hall. And the workers in the hall are veryhard-working. But the elevator in that hall always drives them crazy. Why?Becau

Evil Straw Warts LiveDescriptionA palindrome is astring of symbols that is equal to itself when reversed. Given an input string,not necessarily a palindrome, compute the number of swaps necessar