June 11 2009pku 1947 Rebuilding Roads
April 17 2009pku 1743 Musical Theme
April 14 2009pku 3255 Roadblocks
April 07 2009pku 3177 (3352) Redundant Paths
October 22 2008我叫 Grover Morgan
October 09 2008USACO FEB07 Silver Silver Lilypad Pond 银色莲花池
October 09 2008USACO FEB07 Bronze Bronze Lilypad Pond 青铜莲花池
October 09 2008USACO MAR07 Silver Monthly Expense 月度花费
October 09 2008USACO MAR07 Silver Balanced Lineup 平衡的阵容
October 07 2008USACO MAR07 Silver Cow Traffic 奶牛交通
October 07 2008USACO OCT07 Silver Obstacle Course 障碍训练场
October 07 2008USACO NOV07 Silver Cow Hurdles 奶牛跨栏
October 07 2008USACO NOV07 Silver Milking Time 挤奶时间
October 06 2008USACO DEC07 Silver Building Roads 建造路径
October 05 2008USACO JAN08 Silver Telephone Lines 架设电话线
October 05 2008USACO JAN08 Silver Cow Contest 奶牛的比赛
October 05 2008USACO JAN08 Bronze Costume Party 化装晚会
October 04 2008USACO FEB08 Silver Eating Together 麻烦的聚餐
October 04 2008USACO FEB08 Silver Meteor Shower 流星雨
October 04 2008USACO FEB08 Silver Game of Lines 连线游戏
October 03 2008USACO FEB08 Bronze Dining Cows 晚餐队列安排
September 29 2008USACO MAR08 Gold Cow Jogging 牛跑步
September 28 2008USACO MAR08 Gold Pearl Pairing 珍珠分对
September 28 2008USACO MAR08 Silver River Crossing 奶牛渡河问题
September 28 2008USACO MAR08 Silver Cow Travelling 游荡的奶牛
August 31 2008USACO 5.5.2 Hidden Passwords 隐藏口令 hidden
August 28 2008USACO 5.5.1 Picture 矩形周长 picture
August 28 2008USACO 5.4.5 TeleCowmunication 奶牛的电信 telecow
August 26 2008USACO 5.4.4 Betsy's Tour 漫游小镇 betsy
August 24 2008USACO 5.4.1 Canada Tour 周游加拿大 tour