<ul> <li>Seller: That will be fourteen dollars.</li> <li>Buyer: Here's a twenty.</li> <li>Seller: Sorry, I don't have any change.</li> <li>Buyer: OK, here's a ten and a five. Keep the change.</li> </ul&g…

<p>A crane is a wonderful tool for putting up a building. It makes the job go very quickly. When the building must go up even faster, more than one crane can be used. However, when there are too many cranes working on the same building, it can get danger…

<p>One day, the residents of Main Street got together and decided that they would install wireless internet on their street, with coverage for every house. Now they need your help to decide where they should place the wireless access points. They would l…

<p>Luke has a bit of trouble telling the difference between star systems in the Rebel Alliance and those in the Empire. He has a list of the x,y,z coordinates of each system in the Empire and each in the Alliance, but at warp speed he simply has insuffic…

<p>Fermat's theorem states that for any prime number <i>p</i> and for any integer <i>a &gt; 1</i>, <i>a^p == a (mod p)</i>. That is, if we raise <i>a</i> to the <i>p</i>…

<p><img src="http://plg1.cs.uwaterloo.ca/~acm00/070923/carpool.jpg" alt="" /></p> <p>A group of friends has just completed their CS assignments, and because of the nice weather, they decide to go to Joe's house for a BBQ. Unfortunately,…