摘要:
Stacks of FlapjacksTime limit: 3.000 secondsBackgroundStacks and Queues are often considered the bread and butter of data structures and find use in a... 阅读全文
摘要:
Train SwappingAt an old railway station, you may still encounter one of the last remaining ``train swappers''. A train swapper is an employee of the r... 阅读全文