You operate a market place for buying & selling used textbooks For a giventext book eg\u201CTheoryofCryptography\u201D\nthere are people who want to buy this textbook and people who want to sell\n\nOfferstoBUY:$100$100$99$99$97$90\nOfferstoSELL:$109$110$110$114$115$119\n\nA match occurs when two people agree on a price Some newoffers donotmatchTheseoffersshouldbeaddedtotheactivesetofoffers\n\nForexample:TimofferstoSELLat$150ThiswillnotmatchNooneiswillingtobuyatthatpricesowesavetheoffer\n\nOfferstoSELL::$109$110$110$114$115$119$150\n\nWhenmatchingwewanttogivethecustomerthe\u201Cbestprice\u201D\n\nExamplematches:IfJaneofferstoBUYat$120\n\nshewillmatchandbuyabookfor$109(thelowestoffer

You operate a market place for buying & selling used textbooks For a giventext book eg\u201CTheoryofCryptography\u201D\nthere are people who want to buy this te