| #1740 | [USACO10DEC]苹果交货Apple Delivery |
| #1741 | [USACO10DEC]宝箱Treasure Chest |
| #1742 | [USACO10DEC]槽的游戏The Trough Game |
| #1743 | [USACO11JAN]大陆议会The Continental Cowngress |
| #1744 | [USACO11JAN]道路和飞机Roads and Planes |
| #1745 | [USACO11FEB]奶牛字母Cowlphabet |
| #1746 | [USACO11FEB]最好的括号Best Parenthesis |
| #1747 | [USACO11FEB]三角形The Triangle |
| #1748 | [USACO11MAR]布朗尼切片 |
| #1749 | [USACO11MAR]树装饰Tree Decoration |
| #1750 | [USACO11MAR]会见点Meeting Place |
| #1751 | [USACO11OPEN]焊接Soldering |
| #1752 | [USACO11OPEN]奶牛跳棋Cow Checkers |
| #1753 | [USACO10OCT]汽水机Soda Machine |
| #1754 | [USACO11NOV]高于中位数Above the Median |
| #1755 | [USACO11NOV]二进制数独Binary Sudoku |
| #1756 | [USACO11NOV]牛的障碍Cow Steeplechase |
| #1757 | [USACO11DEC]伞头Umbrellas for Cows |
| #1758 | [USACO11DEC]牧草种植Grass Planting |
| #1759 | [USACO12JAN]配送路线Delivery Route |
| #1760 | [USACO12JAN]贝尔分享Bale Share |
| #1761 | [USACO12JAN]视频游戏的连击Video Game Combos |
| #1762 | [USACO12JAN]牛跑Cow Run |
| #1763 | [USACO12JAN]牛联盟Bovine Alliance |
| #1764 | [USACO12FEB]牛券Cow Coupons |
| #1765 | 存储食物 |
| #1766 | [USACO12FEB]牛的IDCow IDs |
| #1767 | [USACO12MAR]园林绿化Landscaping |
| #1769 | 化缘 |
| #1770 | [USACO12OPEN]解锁块（银）Unlocking Bloc… |
| #1771 | [USACO12OPEN]跑圈Running Laps |
| #1772 | [USACO12DEC]无线网络设置Wifi Setup |
| #1774 | [USACO12DEC]逃跑的BarnRunning Away From… |
| #1775 | [USACO12OPEN]平衡的奶牛群Balanced Cow S… |
| #1776 | [USACO13JAN]派对邀请函Party Invitations |
| #1777 | [USACO13JAN]岛游记Island Travels |
| #1778 | [USACO13FEB]牛奶调度Milk Scheduling |
| #1779 | [USACO13FEB]分区的农场Partitioning the Farm |
| #1780 | [USACO13FEB]出租车Taxi |
| #1781 | [USACO13FEB]路线设计Route Designing |
| #1782 | [USACO13MAR]扑克牌型Poker Hands |
| #1783 | [USACO13MAR]农场的画Farm Painting |
| #1784 | [USACO13MAR]牛跑The Cow Run |
| #1785 | [USACO13OPEN]豪华游船Luxury River Cruise |
| #1786 | [USACO13OPEN]照片Photo |
| #1787 | [USACO13NOV]挤奶牛Crowded Cows |
| #1788 | [USACO13NOV]POGO的牛Pogo-Cow |
| #1789 | [USACO13NOV]没有找零No Change |
| #1790 | 孙悟空的奖励 |
| #1791 | [USACO13DEC]假期计划Vacation Planning |
| #1792 | [USACO13DEC]假期计划（黄金）Vacation Planning (gold) |
| #1793 | [USACO13DEC]最优挤奶Optimal Milking |
| #1794 | [USACO13DEC]贝西洗牌（金）The Bessie Shuffle (gol… |
| #1795 | [USACO14JAN]滑雪等级Ski Course Rating |
| #1796 | [USACO14FEB]秘密代码Secret Code |
| #1797 | [USACO14MAR]数朋友Counting Friends |
| #1798 | [USACO14OPEN]公平的摄影Fair Photography |
| #1799 | [USACO14OPEN]GPS的决斗Dueling GPS's |
| #1800 | [USACO14DEC]驮运Piggy Back |
| #1801 | [USACO14DEC]牛慢跑Cow Jog_Sliver |
| #1802 | [USACO14DEC]后卫马克Guard Mark |
| #1803 | [USACO14DEC]马拉松赛跑Marathon_Gold |
| #1804 | [USACO15JAN]踩踏Stampede |
| #1805 | [USACO15JAN]牛路线Cow Routing |
| #1806 | [USACO15JAN]约会时间Meeting Time |
| #1807 | [USACO15JAN]牛的矩形Cow Rectangles |
| #1808 | [USACO15JAN]电影移动Moovie Mooving |
| #1809 | [USACO15JAN]草鉴定Grass Cownoisseur |
| #1810 | [USACO15FEB]牛跳房子（金）Cow Hopscotch (Gold) |
| #1811 | [USACO15FEB]审查Censoring |
| #1812 | [USACO15OPEN]贝茜说哞Bessie Goes Moo |
| #1813 | [USACO15OPEN]被困在haybales（银）Trapped in the H… |
| #1814 | [USACO15OPEN]回文的路径Palindromic Paths |
| #1815 | [USACO15OPEN]被困在haybales（金）Trappe… |
| #1816 | [USACO15DEC]最大流Max Flow |
| #1817 | [USACO15DEC]高低卡(白金)High Card Low Card (Platinum) |
| #1818 | [USACO15DEC]计数haybalesCounting Haybales |
| #1819 | [USACO16JAN]无线电联系Radio Contact |
| #1820 | [USACO16JAN]堡哞Fort Moo |
| #1821 | [USACO16JAN]割草场Mowing the Field |
| #1822 | [USACO16FEB]圆形谷仓Circular Barn_Silver |
| #1823 | [USACO16FEB]负载平衡Load Balancing_Silver |
| #1824 | [USACO16FEB]牛奶桶Milk Pails |
| #1825 | [USACO16FEB]再探圆形谷仓Circular Barn R… |
| #1826 | [USACO16FEB]围栏Fenced In_Platinum |
| #1827 | [USACO16OPEN]减小田地Field Reduction |
| #1828 | 化石 |
| #1829 | [USACO16OPEN]关闭农场Closing the Farm_Silver |
| #1830 | [USACO16OPEN]分割田地Splitting the Field |
| #1832 | [USACO16OPEN]262144 |
| #1833 | 正整数序列 |
| #1834 | [CQOI2009]DANCE跳舞 |
| #1835 | [CQOI2009]MATCH循环赛 |
| #1837 | [CQOI2011]动态逆序对 |
| #1838 | [CQOI2012]交换棋子 |
| #1839 | [CQOI2012]局部极小值 |
| #1842 | [CQOI2014]排序机械臂 |
| #1847 | [HAOI2009]巧克力 |
| #1854 | [USACO16DEC]Counting Haybales数草垛 |
| #1855 | [HNOI2007]分裂游戏 |
HelloWorld信息学奥赛题库