| 4148 | Loan Repayment | USACO 2020 January Silver | 0 | 2 | 0.00% |
| 4149 | Wormhole Sort | USACO 2020 January Silver | 1 | 2 | 50.00% |
 4150 | 워드 프로세서 translate auto_awesome 스페셜 저지 | USACO 2020 January Bronze | 13 | 25 | 52.00% |
 4151 | 사진 촬영 translate | USACO 2020 January Bronze | 4 | 10 | 40.00% |
| 4152 | Race | USACO 2020 January Bronze | 3 | 7 | 42.86% |
 4153 | Delegation | USACO 2020 February Platinum | 1 | 1 | 100.00% |
| 4154 | Equilateral Triangles | USACO 2020 February Platinum | 0 | 0 | |
| 4155 | Help Yourself translate | USACO 2020 February Platinum | 0 | 0 | |
| 4156 | Timeline | USACO 2020 February Gold | 1 | 2 | 50.00% |
 4157 | Help Yourself | USACO 2020 February Gold | 4 | 12 | 33.33% |
 4158 | Delegation | USACO 2020 February Gold | 3 | 5 | 60.00% |
| 4159 | Swapity Swapity Swap | USACO 2020 February Contest Silver | 0 | 0 | |
 4160 | Triangles | USACO 2020 February Contest Silver | 1 | 1 | 100.00% |
| 4161 | Clock Tree | USACO 2020 February Contest Silver | 0 | 0 | |
| 4162 | 삼각형 목초지 translate | USACO 2020 February Bronze | 3 | 4 | 75.00% |
| 4163 | 매드 사이언티스트 translate | USACO 2020 February Bronze | 2 | 4 | 50.00% |
| 4164 | Swapity Swap | USACO 2020 February Bronze | 1 | 2 | 50.00% |
| 4165 | Sprinklers 2: Return of the Alfalfa | USACO 2020 US Open Platinum | 0 | 0 | |
| 4166 | Exercise | USACO 2020 US Open Platinum | 0 | 0 | |
 4167 | Circus | USACO 2020 US Open Platinum | 2 | 50 | 4.00% |
| 4168 | Haircut | USACO 2020 US Open Gold | 3 | 5 | 60.00% |
| 4169 | Favorite Colors | USACO 2020 US Open Gold | 2 | 7 | 28.57% |
| 4170 | Exercise | USACO 2020 US Open Gold | 3 | 5 | 60.00% |
| 4171 | Social Distancing | USACO 2020 US Open Silver | 0 | 0 | |
 4172 | Cereal | USACO 2020 US Open Silver | 24 | 218 | 11.01% |
| 4173 | The Moo Particle | USACO 2020 US Open Silver | 0 | 0 | |
| 4174 | Social Distancing I | USACO 2020 US Open Bronze | 1 | 1 | 100.00% |
| 4175 | Social Distancing II | USACO 2020 US Open Bronze | 1 | 1 | 100.00% |
| 4176 | Cowntact Tracing translate | USACO 2020 US Open Bronze | 1 | 2 | 50.00% |
 4177 | 순열정복 1 | JUNGOL - ohjtgood | 322 | 481 | 66.94% |
| 4178 | 순열정복 2 | JUNGOL - ohjtgood | 291 | 498 | 58.43% |
| 4179 | 순열정복 3 | JUNGOL - ohjtgood | 259 | 335 | 77.31% |
 4180 | 순열정복 4 | ohjtgood | 17 | 20 | 85.00% |
 4181 | 순열정복 5 | ohjtgood | 17 | 22 | 77.27% |
| 4182 | 순열정복 6 | ohjtgood | 10 | 10 | 100.00% |
 4183 | 순열정복 7 | ohjtgood | 7 | 7 | 100.00% |
| 4184 | 순열정복 8 (완결) | ohjtgood | 3 | 7 | 42.86% |
| 4187 | 백설공주와 난쟁이 | COCI 2009/2010 Contest #3 5번 | 2 | 10 | 20.00% |
| 4188 | 최대 부분수열 | USACO December 2006 Contest > Gold 3번 milk pattern | 175 | 391 | 44.76% |
 4189 | 장기 2 | | 1355 | 4377 | 30.96% |
| 4191 | [swat] 구슬꺼내기 | swat | 242 | 578 | 41.87% |
| 4192 | [swat]2048(Easy) | | 2 | 3 | 66.67% |
| 4193 | [swat] 애벌레 키우기1 | swat | 25 | 55 | 45.45% |
| 4194 | [swat] 수강신청 | swat | 112 | 326 | 34.36% |
| 4197 | [swat]연습실 | | 14 | 40 | 35.00% |
| 4198 | [swat]산불 | | 15 | 29 | 51.72% |
| 4199 | [swat]로봇청소기 | | 13 | 24 | 54.17% |
| 4200 | [swat]연산자 끼워넣기 | | 1 | 1 | 100.00% |
| 4201 | [swat]스타트와 링크 | | 1 | 1 | 100.00% |
| 4204 | [swat]감시 | | 2 | 3 | 66.67% |
