Arbitrage is the use of discrepancies in currency exchange rates to transform one unit of a currency into more than one unit of the same currency. for example, suppose that 1 u. s. dollar buys 49 indian rupees, 1 indian rupee buys 2 japanese yen, and 1 japanese yen buys 0.0107 u. s. dollars. then, by converting currencies, a trader can start with 1 u. s. dollar and buy 49 x 2 x 0.0107 = 1.0486 u. s. dollars, thus turning a profit of 4.86 percent. suppose that we are given n currencies c1, c2, cn and an n x n table r of exchange rates, such that one unit of currency ci buys r[i, j] units of currency cj. a. give an efficient algorithm to determine whether or not there exists a sequence of currencies {ci1, ci2, cik} such that r[i1, i2] * r[i2, i3] r[ik-1, ik] * r[ik, i1] > 1. analyze the running time of your algorithm. b. give an efficient algorithm to print out such a sequence if one exists. analyze the running time of your algorithm.

the answer would be d. online forums.

hope it

professionals can use many types of technology that can them. some examples are, computers (they research and can use for programs for data, they are also used for job applications, school work, and even to make new ideas), speedometers (can get data for unknown data), sometimes something as small as a pen (used for rough drafts, to insert data, and again job applications).

a  social news website  is an  internet  website  that features  user-posted stories. such stories are ranked based on popularity, as voted on by other users of the site or by website administrators. users typically comment online on the news posts and these comments may also be ranked in popularity. since their emergence with the birth of  web 2.0, social news sites have been used to link many types of information, including news, humor, support, and discussion. all such websites allow the users to submit content and each site differs in how the content is moderated. on the  slashdot  and  fark  websites,  administrators  decide which articles are selected for the front page. on  reddit  and  digg, the articles that get the most votes from the community of users will make it to the front page. many social news websites also feature an online comment system, where users discuss the issues raised in an article. some of these sites have also applied their voting system to the comments, so that the most popular comments are displayed first. some social news websites also have a  social networking  function, in that users can set up a user profile and follow other users' online activity on the website.