2008年北京賽區賽題
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年寜波賽區賽題
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年杭州賽區賽題
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年福州賽區賽題
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
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