| October 0문제 expand_more |
| November 3문제 expand_more |
| 1549 | 서커스 | USACO 2005 November Silver, poj 3045 | 23 | 120 | 19.17% |
 1882 | 우주여행 | USACO 2005 November Gold, poj3041 Asteroids | 93 | 495 | 18.79% |
 1131 | 위성사진 | USACO 2005, poj 3051 | 324 | 617 | 52.51% |
| December 3문제 expand_more |
| 1616 | 그룹찾기(Cow Patterns) | USACO 2005 December Contest gold1 | 7 | 33 | 21.21% |
| 2713 | 생일선물사기(젖소 심마니) | USACO 2005 December Silver, Mid-Central USA 2013 | 24 | 112 | 21.43% |
| 2711 | 볼링 점수 | USACO 2005 December Bronze | 81 | 195 | 41.54% |
| January 1문제 expand_more |
 3639 | 진흙 밭(잡초덮기) | USACO January 2005 Contest Gold 1번 Muddy Fields | 30 | 101 | 29.70% |
| February 2문제 expand_more |
 8133 | 일곱 칸의 보물 | USACO February 2005 Silver 2번 | 4 | 12 | 33.33% |
 5804done | 환경부의 나무 심기 프로젝트 | USACO 2005 February Gold | 429 | 1907 | 22.50% |
| March 3문제 expand_more |
| 2194 | 요플레 공장 | USACO March 2005 Silver 1번, Gold 3번 | 1733 | 5090 | 34.05% |
| 1493 | 비 피하기 (takeshelter) | USACO 2005 March Gold | 23 | 99 | 23.23% |
| 2769 | 블록 쌓기 | USACO 2005 March Gold | 10 | 29 | 34.48% |
| US Open 0문제 expand_more |
