[中譯] Puzzleup 2013 (5) Pool Of Problems
看板puzzle (益智遊戲 - 數獨,拼圖,推理,西洋棋)作者TokuchiToa (渡久地東亞)時間12年前 (2013/08/21 19:45)推噓1(1推 0噓 11→)留言12則, 5人參與討論串1/1
題目網址: http://www.puzzleup.com/2013/
http://www.puzzleup.com/2013/puzzle/?246
答題時限: ８月２２日７ＰＭ－比賽結束（約12月11日）
加分時限: ８月２２日７ＰＭ－８月２６日６：５９ＰＭ
答對可得基本分１００分。答案可上傳５次，每改１次答案從基本分扣２０分。
比賽期間內可隨時上傳答案，加分時限內答對第ｎ天加（６－ｎ）分
另依題目的難易有額外加分（如有８０％的人這題答錯，答對者加８０分）
◆Pool Of Problems
Using a pool of problems, 20 tests will be formed.
-Every test should have the same number of problems.
-Any problem should be included in at most 10 tests.
-For every 5 tests, there should be at least 2 problems common to all of them.
What can be the minimum number of problems in this pool?
你必須從題庫中出題設計二十份考題。
- 每份考題都要有一樣多的題目
- 每道題目最多在十份考題中出現
- 任意五個考題都至少要有兩題一樣的題目
請問滿足這個條件的題庫至少要有幾題?
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