Drazilcreatedafollowingproblemaboutputting1 × 2tilesintoann × mgrid:"Thereisagridwithsomecellsthatareemptyandsomecellsthatareoccupied.Youshoulduse1 × 2tilestocoverallemptycellsandnotwotilesshouldcovereachother.Andyoushouldprintasolutionabouthowtodoit."ButDrazildoesn'tliketowritespecialcheckingprogramforthistask.Hisfriend,Vardaadvisedhim:"howaboutaskingcontestantonlytoprintthesolut...
DrazilisplayingamathgamewithVarda.Let'sdefineforpositiveintegerxasaproductoffactorialsofitsdigits.Forexample,.First,theychooseadecimalnumberaconsistingofndigitsthatcontainsatleastonedigitlargerthan1.Thisnumbermaypossiblystartwithleadingzeroes.Thentheyshouldfindmaximumpositivenumberxsatisfyingfollowingtwoconditions:1.xdoesn'tcontainneitherdigit0nordigit1.2.=.Helpfriendsfindsuchnumber.Input...
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