Jekyll2023-11-30T00:15:40-08:00https://yichiliao.com/feed.xmlYi-ChiPh.D. candidate / postdoc researcher.Yi-Chi Liaoyi-chi.liao@aalto.fi100 Computer Scientists Challenge2018-05-28T00:00:00-07:002018-05-28T00:00:00-07:00https://yichiliao.com/posts/2018/05/100ppl<p>There are 10 sets of 10 computer scientists. 9 sets of them are weight exactly the same, and you already know how much weight they should be. However, in the last set of computer scientests, all of them are 1 kg off (you have no idea they are either all 1 kg ligher or all 1 kg heavier), making the entire set of computer scientists 10 kg lighter or heavier than the other sets.</p>
<p>There’s an extremely accurate digital scale that you are allowed to use only once. The scale won’t be broken no matter how many computer scientists is on it. Question: how do you determine which set of 10 computer scientists is the fault one?</p>
<p>Difficulty Level: MEDIUM.</p>
<hr />
<h1 id="please-pm-me-your-answer-or-come-to-b235-directly-theres-a-present-for-the-first-solve-the-puzzle">Please PM me your answer, or come to B235 directly. There’s a present for the first solve the puzzle.</h1>Yi-Chi Liaoyi-chi.liao@aalto.fiThere are 10 sets of 10 computer scientists. 9 sets of them are weight exactly the same, and you already know how much weight they should be. However, in the last set of computer scientests, all of them are 1 kg off (you have no idea they are either all 1 kg ligher or all 1 kg heavier), making the entire set of computer scientists 10 kg lighter or heavier than the other sets.HINTS: Twelve Computer Scientists Challenge2018-05-24T00:00:00-07:002018-05-24T00:00:00-07:00https://yichiliao.com/posts/2018/05/12people-hints<p>Please highlight to check the hints.</p>
<p>Hint #1:<br />
<span style="color:white">There are at least 2 ACTUAL solutions, which don’t involve beating someone with the seesaw nor prototyping a digital weight scale nor asking the 12 computer scientists to brainstorm with you.</span></p>
<p><br />
Hint #2:<br />
<span style="color:white">Think about the base case, which means, if you can only use the seesaw once, under what conditions (how many candidates, etc) can you identify the one with different weight.</span></p>
<p><br />
Hint #3:<br />
<span style="color:white">The first step should be dividing 12 computer scientists into 3 groups of 4 people.</span></p>
<hr />Yi-Chi Liaoyi-chi.liao@aalto.fiPlease highlight to check the hints.Twelve Computer Scientists Challenge2018-05-22T00:00:00-07:002018-05-22T00:00:00-07:00https://yichiliao.com/posts/2018/05/puzzle<p>There are 12 computer scientists, 11 of them have the exact same weight. However, the last one is either heavier or lighter than others (but you don’t know which is the case).</p>
<p>Your job is to identify the one with different weight. The only tool is a seesaw, which unfortunately can be used only 3 times.</p>
<p>Please find out how to finish your job in these conditions. How do you use the seesaw?</p>
<hr />
<p>Hints out at <a href="http://yichiliao.com/posts/2018/05/24-12people-hints/">here</a></p>
<h1 id="if-you-solve-the-puzzle-please-come-get-your-present-at-b235">If you solve the puzzle, please come get your present at B235.</h1>Yi-Chi Liaoyi-chi.liao@aalto.fiThere are 12 computer scientists, 11 of them have the exact same weight. However, the last one is either heavier or lighter than others (but you don’t know which is the case).