摘要：
Description We know that if a phone number A is another phone number B’s prefix, B is not able to be called. For an example, A is 123 while B is 12345 阅读全文
摘要：
DescriptionBothSayaandKudolikeballoons.Oneday,theyheardthatinthecentralpark,therewillbethousandsofpeopleflyballoonstopatternabigimage.Theywereveryinterestedaboutthisevent,andalsocuriousabouttheimage.Sincetherearetoomanyballoons,itisveryhardforthemtocomputeanythingtheyneed.Canyouhelpthem?Youcanassume 阅读全文