USACO(USA Computing Olympiad)全称美国计算机奥林匹克竞赛,是美国一项面向全球中学生的信息学线上竞赛。
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usaco历年月赛和公开赛铜组和银组题目
Section 6. USACO 2020 January Contest
Open
| Problem | Tried | AC | Difficulty |
|---|---|---|---|
| USACO2276 单词处理器 | 3 | 2 | 10 |
| USACO2277 拍照 | 7 | 2 | 10 |
| USACO2278 赛跑 | 3 | 2 | 10 |
| USACO2279 浆果采摘 | 4 | 2 | 5 |
| USACO2280 偿还借款 | 3 | 2 | 7 |
| USACO2281 虫洞排序 | 7 | 2 | 7 |
Section 7. USACO 2020 February Contest
Open
| Problem | Tried | AC | Difficulty |
|---|---|---|---|
| USACO2288 三角形 | 2 | 2 | 10 |
| USACO2289 疯狂的科学家 | 2 | 2 | 10 |
| USACO2290 交换交换 | 4 | 2 | 10 |
| USACO2291 交换交换交换 | 3 | 2 | 5 |
| USACO2292 三角形 | 6 | 2 | 7 |
| USACO2293 时钟树 | 3 | 2 | 5 |
Section 8. USACO 2020 US Open Contest
Open
| Problem | Tried | AC | Difficulty |
|---|---|---|---|
| USACO2300 社交距离 I | 9 | 2 | 10 |
| USACO2301 社交距离 II | 3 | 2 | 10 |
| USACO2302 接触追踪 | 3 | 2 | 10 |
| USACO2303 社交距离 | 3 | 2 | 5 |
| USACO2304 麦片 | 4 | 2 | 5 |
| USACO2305 哞粒子 | 5 | 2 | 5 |
Section 9. USACO 2020 December Contest
Open
| Problem | Tried | AC | Difficulty |
|---|---|---|---|
| USACO2312 你知道你的ABC吗 | 3 | 2 | 10 |
| USACO2313 菊花链 | 4 | 2 | 10 |
| USACO2314 墨守成规 | 4 | 2 | 10 |
| USACO2315 牛传染病 | 7 | 2 | 5 |
| USACO2316 矩形牧场 | 3 | 1 | 7 |
| USACO2317 墨守成规 | 4 | 1 | 8 |
Section 10. USACO 2021 January Contest
Open
| Problem | Tried | AC | Difficulty |
|---|---|---|---|
| USACO2324 放养但没有完全放养 | 3 | 2 | 10 |
| USACO2325 更多奇怪的照片 | 2 | 2 | 10 |
| USACO2326 牛棚 | 2 | 2 | 10 |
| USACO2327 舞步 | 4 | 2 | 7 |
| USACO2328 无暇上色 | 2 | 2 | 7 |
| USACO2329 分散 | 2 | 2 | 7 |
Section 11. USACO 2021 February Contest
Open
| Problem | Tried | AC | Difficulty |
|---|---|---|---|
| USACO2336 牛年 | 3 | 2 | 10 |
| USACO2337 舒适的奶牛 | 4 | 2 | 10 |
| USACO2338 顺时针围栏 | 3 | 2 | 10 |
| USACO2339 舒适的奶牛 | 11 | 1 | 5 |
| USACO2340 牛年 | 2 | 2 | 5 |
| USACO2341 刚好够绿 | 2 | 2 | 7 |
Section 12. USACO 2021 US Open Contest
Open
| Problem | Tried | AC | Difficulty |
|---|---|---|---|
| USACO2348 牛的学术圈 I | 3 | 2 | 10 |
| USACO2349 牛的学术圈 II | 2 | 2 | 10 |
| USACO2350 牛的学术圈 III | 2 | 2 | 10 |
| USACO2351 迷宫井字棋 | 2 | 1 | 7 |
| USACO2352 你知道你的ABC吗 | 3 | 2 | 5 |
| USACO2353 牛的学术圈 | 3 | 2 | 5 |
Section 13. USACO 2021 December Contest
Open
| Problem | Tried | AC | Difficulty |
|---|---|---|---|
| USACO2360 孤独的照片 | 2 | 2 | 10 |
| USACO2361 空调 | 4 | 2 | 10 |
| USACO2362 走路回家 | 7 | 2 | 10 |
| USACO2363 最近的奶牛获胜 | 2 | 2 | 7 |
| USACO2364 连接两个牛棚 | 4 | 2 | 7 |
| USACO2365 复杂区间 | 3 | 2 | 5 |
Section 14. USACO 2022 January Contest
Open
| Problem | Tried | AC | Difficulty |
|---|---|---|---|
| USACO2372 Herdle | 2 | 2 | 10 |
| USACO2373 非传递骰子 | 2 | 2 | 10 |
| USACO2374 大旱 | 3 | 2 | 10 |
| USACO2375 寻找灵魂伴侣 | 3 | 2 | 7 |
| USACO2376 奶牛飞盘 | 3 | 2 | 5 |
| USACO2377 麦片2 | 1 | 0 | 7 |
Section 15. USACO 2022 February Contest
Open
| Problem | Tried | AC | Difficulty |
|---|---|---|---|
| USACO2384 上课睡觉 | 3 | 2 | 10 |
| USACO2385 拍照2 | 4 | 2 | 10 |
| USACO2386 积木 | 3 | 2 | 10 |
| USACO2387 重新分配礼物 | 2 | 2 | 5 |
| USACO2388 机器人指令 | 3 | 2 | 7 |
| USACO2389 电子邮件归档 | 4 | 1 | 7 |
Section 16. USACO 2022 US Open Contest
Open
| Problem | Tried | AC | Difficulty |
|---|---|---|---|
| USACO2396 照相 | 2 | 2 | 10 |
| USACO2397 谎牛计数 | 3 | 2 | 10 |
| USACO2398 炼金术 | 2 | 2 | 10 |
| USACO2399 访问 | 2 | 2 | 7 |
| USACO2400 子集相等 | 2 | 2 | 10 |
| USACO2401 奶牛操作 | 2 | 2 | 5 |
Section 17. USACO 2022 December Contest
Open
| Problem | Tried | AC | Difficulty |
|---|---|---|---|
| USACO2408 奶牛大学 | 3 | 2 | 3 |
| USACO2409 喂饱奶牛 | 6 | 2 | 5 |
| USACO2410 逆向工程 | 3 | 2 | 7 |
| USACO2411 牛棚树 | 2 | 2 | 7 |
| USACO2412 环形牛棚 | 14 | 2 | 9 |
| USACO2413 范围重构 | 1 | 0 | 10 |
Section 18. USACO 2023 January Contest
Open
| Problem | Tried | AC | Difficulty |
|---|---|---|---|
| USACO2420 领导者 | 3 | 2 | 5 |
| USACO2421 空调II | 2 | 2 | 10 |
| USACO2422 哞操作 | 2 | 2 | 10 |
| USACO2423 查找和替换 | 2 | 1 | 7 |
| USACO2424 遵循指示 | 5 | 2 | 5 |
| USACO2425 哞路线 | 2 | 0 | 10 |
Section 19. USACO 2023 February Contest
Open
| Problem | Tried | AC | Difficulty |
|---|---|---|---|
| USACO2432 饥饿的牛 | 6 | 2 | 10 |
| USACO2433 印章网格 | 3 | 2 | 10 |
| USACO2434 观看Mooloo | 2 | 2 | 10 |
| USACO2435 面包店 | 2 | 2 | 7 |
| USACO2436 牛的不在场证明 | 2 | 2 | 5 |
| USACO2437 哞路线II | 4 | 2 | 5 |
Section 20. USACO 2023 US Open Contest
Open
| Problem | Tried | AC | Difficulty |
|---|---|---|---|
| USACO2444 FEB | 3 | 2 | 5 |
| USACO2445 哞语言 | 2 | 0 | 7 |
| USACO2446 轮换和移位 | 3 | 2 | 5 |
| USACO2447 牛奶总量 | 4 | 2 | 5 |
| USACO2448 户外集会 | 3 | 2 | 5 |
| USACO2449 妄想症 | 7 | 2 | 5 |
Section 21. USACO 2023 December Contest
Open
| Problem | Tried | AC | Difficulty |
|---|---|---|---|
| USACO2456 拐杖糖盛宴 | 4 | 2 | 3 |
| USACO2457 密接牛追踪2 | 3 | 2 | 5 |
| USACO2458 农夫约翰真的种地 | 4 | 2 | 5 |
| USACO2459 奶牛杂技 | 2 | 2 | 5 |
| USACO2460 环形一致 | 3 | 2 | 5 |
| USACO2461 射击练习 | 2 | 2 | 5 |
Section 22. USACO 2024 January Contest
Open
| Problem | Tried | AC | Difficulty |
|---|---|---|---|
| USACO2468 多数意见 | 2 | 2 | 5 |
| USACO2469 炮弹 | 2 | 2 | 5 |
| USACO2470 平衡细菌 | 3 | 2 | 5 |
| USACO2471 牲任力 | 4 | 2 | 8 |
| USACO2472 刷药水 | 2 | 2 | 5 |
| USACO2473 牛历 | 2 | 2 | 5 |
Section 23. USACO 2024 February Contest
Open
| Problem | Tried | AC | Difficulty |
|---|---|---|---|
| USACO2480 回文游戏 | 2 | 2 | 3 |
| USACO2481 牛奶交换 | 2 | 2 | 10 |
| USACO2482 最大限度地提高生产力 | 2 | 2 | 10 |
| USACO2483 射击练习II | 13 | 1 | 10 |
| USACO2484 试管 | 2 | 0 | 10 |
| USACO2485 弹珠 | 2 | 2 | 7 |
Section 24. USACO 2024 US Open Contest
Open
| Problem | Tried | AC | Difficulty |
|---|---|---|---|
| USACO2492 哞语言逻辑 | 1 | 1 | 7 |
| USACO2493 沿栅栏散步 | 1 | 1 | 3 |
| USACO2495 农夫约翰最喜欢的排列 | 1 | 1 | 10 |
| USACO2496 贝茜的面试 | 3 | 2 | 10 |
| USACO2497 粉刷栅栏柱 | 0 | 0 | (None) |
| USACO2498 胜利基因 | 2 | 2 | 10 |
Section 25. USACO 2024 December Contest
Open
| Problem | Tried | AC | Difficulty |
|---|---|---|---|
| USACO2505 迂回舍入 | 1 | 1 | 5 |
| USACO2506 农夫约翰的奶酪块 | 1 | 1 | 3 |
| USACO2507 哞叫时间 | 1 | 1 | 5 |
| USACO2508 蛋糕游戏 | 2 | 2 | 5 |
| USACO2509 砍森林 | 4 | 2 | 7 |
| USACO2510 2D传送带 | 2 | 2 | 7 |
Section 26. USACO 2025 January Contest
Open
| Problem | Tried | AC | Difficulty |
|---|---|---|---|
| USACO2517 星星叠加 | 1 | 1 | 10 |
| USACO2518 哞叫时间II | 1 | 1 | 5 |
| USACO2519 奶牛体检 | 1 | 1 | 5 |
| USACO2520 奶牛体检 | 3 | 2 | 7 |
| USACO2521 农夫约翰最喜欢的操作 | 2 | 2 | 7 |
| USACO2522 表格恢复 | 3 | 2 | 7 |
Section 27. USACO 2025 February Contest
Open
| Problem | Tried | AC | Difficulty |
|---|---|---|---|
| USACO2529 翻转 | 0 | 0 | (None) |
| USACO2530 构造Mexes | 0 | 0 | (None) |
| USACO2531 输出序列 | 0 | 0 | (None) |
| USACO2532 最佳排队 | 2 | 2 | 5 |
| USACO2533 词汇测验 | 3 | 1 | 5 |
| USACO2534 转变对 | 2 | 2 | 5 |
Section 28. USACO 2025 US Open Contest
Open
| Problem | Tried | AC | Difficulty |
|---|---|---|---|
| USACO2541 蹄子剪刀布-1.0 | 0 | 0 | (None) |
| USACO2542 更多奶牛照片 | 0 | 0 | (None) |
| USACO2543 哞叫时间III | 0 | 0 | (None) |
| USACO2544 序列构造 | 3 | 0 | 7 |
| USACO2545 兼容对 | 2 | 2 | 7 |
| USACO2546 滑雪坡道 | 3 | 2 | 10 |
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