Problem Description As far as we known,there are so many people in this world,expecially in china.But many people like LJ always insist on that more people mo...
“Waiting for orders we held in the wood, word from the front never came By evening the sound of the gunfire was miles away Ah softly we moved through the sh...
Suppose that we have a square city with straight streets. A map of a city is a square board with n rows and n columns, each representing a street or a piece of ...
Problem Description background: A new semester comes , and the HDU also meets its 50th birthday. No matter what’s your major, the only thing I want to tell ...