Archive 2015 Mar-8th UVa 1679 - Easy Geometry 三分二分函數觀點幾何 2014 Oct-23rd UVa 10794 - The Deadly Olympic Returns 三分幾何 Jul-6th UVa 11243 - Texas Trip 三分最小覆蓋正方形 Jun-24th UVa 427 - FlatLand Piano Movers 三分