| 4019 | 小张的旅游 | 8/15 | |
| 4020 | 求第k大数 | 13/32 | |
| 4022 | [NOIP2004 提高组] 虫食算 | 0/5 | |
| 4023 | 2.3.3 file zerosum | 3/4 | |
| 4024 | 3.1.1 Agri-Net最短网络 | 0/7 | |
| 4025 | 3.1.2 Score Inflation总分 | 0/3 | |
| 4026 | 3.1.3 Humble Numbers丑数 | 0/4 | |
| 4027 | 3.1.4 Shaping Regions形成的区域 | 0/3 | |
| 4028 | 3.1.5 Contact 联系 | 0/2 | |
| 4029 | 3.1.6 Stamps 邮票 | 2/3 | |
| 4030 | 3.2.1 Factorials阶乘 | 0/3 | |
| 4031 | 3.2.2 Stringsobits01串 Kim Schrijvers | 0/3 | |
| 4032 | 3.2.4 Feed Ratios饲料调配 | 0/3 | |
| 4033 | 3.2.5 Magic Squares 魔板 | 0/2 | |
| 4034 | 3.2.6 Sweet Butter 香甜的黄油 | 0/2 | |
| 4035 | 1.4.2 The Clocks (clocks) | 0/2 | |
| 4036 | 2.3.4 Controlling Companies (concom) | 2/3 | |
| 4037 | 3.3.1 Riding The Fences (fence) | 0/1 | |
| 4038 | 3.3.2 Shopping Offers (shopping) | 0/3 | |
| 4039 | 3.3.4 Home on the Range (range) | 0/2 | |
| 4040 | 3.3.5 A Game (game1) | 0/3 | |
| 4041 | 3.4.1 Closed Fences (fence4) | 0/1 | |
| 4042 | 3.4.2 American Heritage (heritage) | 0/2 | |
| 4043 | 3.4.3 Electric Fence (fence9) | 0/1 | |
| 4044 | 3.4.4 Raucous Rockers (rockers) | 0/1 | |
| 4045 | 4.1.1 Beef McNuggets (nuggets) | 0/4 | |
| 4046 | 4.1.2 Fence Rails (fence8) | 0/2 | |
| 4047 | 4.1.4 Cryptcowgraphy (cryptcow) | 0/1 | |
| 4048 | 4.2.1 Drainage Ditches (ditch) | 0/1 | |
| 4049 | 4.2.2 The Perfect Stall (stall4) | 0/2 | |
| 4050 | 4.2.3 Job Processing (job) | 0/2 | |
| 4051 | 4.2.4 Cowcycles (cowcycle) | 0/1 | |
| 4052 | 4.3.1 Buy Low, Buy Lower (buylow) | 0/2 | |
| 4053 | 4.3.4 Letter Game (lgame) | 0/1 | |
| 4054 | 4.4.1 Shuttle Puzzle (shuttle) | 0/1 | |
| 4055 | 5.1.1 Fencing the Cows (fc) | 0/1 | |
| 4056 | 5.2.2 Electric Fences (fence3) | 0/2 | |
| 4057 | 6.1.1 Postal Vans (vans) | 0/1 | |
| 4058 | 【USACO2008FEB】酒店 | 0/1 | |
| 4060 | 排队接水 | 4/16 | |
| 4062 | 麦子与国际象棋 | 38/193 | |
| 4063 | 不容易系列 | 7/9 | |
| 4064 | 发工资咯 | 8/9 | |
| 4065 | 成绩转换 | 6/29 | |
| 4066 | 换位置 | 5/6 | |
| 4067 | 方砖问题 | 5/5 | |
| 4073 | 高斯日记 | 11/22 | |
| 4074 | 马虎的算式 | 0/29 | |
| 4075 | 微生物增殖 | 9/25 | |
| 4076 | 【基础背包入门5】金明的预算方案 | 11/12 | |