摘要：
DescriptionDr lee cuts a string S into N pieces,s[1],…,s[N]. Now, Dr lee gives you these N sub-strings: s[1],…s[N]. There might be several possibiliti... 阅读全文
摘要：
DescriptionCraig is fond of planes. Making photographs of planes forms a major part of his daily life. Since he tries to stimulate his social life, an... 阅读全文
摘要：
DescriptionMost bicycle speedometers work by using a Hall Effect sensor fastened to the front fork of the bicycle. A magnet is attached to one of the ... 阅读全文