2008年北京赛区赛题

Problem A．Destroying the bus stations

Problem B．A simple stone game

Problem C．Ugly Windows

Problem D．Tornado

Problem E．Minimal Ratio Tree

Problem F．Parade

Problem G．Priest John’s Busiest Day

Problem H．Ping pong

Problem I．Timer

Problem J．Elevator

2009年宁波赛区赛题

Problem A．Facer is learning to swim

Problem B．Zombies VS Plants

Problem C．Seat taking up is tough

Problem D．Ancient vending machine

Problem E．Open-air shopping malls

Problem F．Posters

Problem G.Hamlet’s gambling

Problem H．Graph Game

Problem I．Columbus’s bargain

Problem J．P2P File Sharing System

2010年杭州赛区赛题

Problem A．Naughty fairies

Problem B．Prison Break

Problem C．To Be an Dream Architect

Problem D．Gomoku

Problem E．Gunshots

Problem F．Rotational Painting

Problem G．Traffic Real Time Query system

Problem H．National Day Parade

Problem I．Searchlights

Problem J．Infinite monkey theorem

2010年福州赛区赛题

Problem A．Knight’S Problem

Problem B．Nubulsa Expo

Problem C．Shade of Hallelujah Mountain

Problem D．Math teacher’s homework

Problem E．Fermat Point in Quadrangle

Problem F．Computer Virus on Planet Pandora

Problem G．Farm Game

Problem H．Selecting courses

Problem I．Let the light guide us

Problem J．A hard Aoshu Problem