errichtoc专题

【IndiaHacks 2016 - Online Edition (Div 1 + Div 2) ErrichtoC】【脑洞 好题 讨论?NO!暴力】Bear and Up-Down 多少种一次交

Bear and Up-Down time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output The life goes up and down, just like nice sequences. S