gerald friend Pollard Pollard interest lucky ticket ticket sequence digit at thought ticket lucky digit add arithmetic sign bracket result obtain arithmetic expression number 100 but quickly analyze ticket move general question now explore klucky ticketspollard sais ticket klucky add arithmetic operation sign digit leave right ie bracket obtain correct arithmetic expression value equal k for example ticket 224201016 1000lucky 2242010161000pollard carry away lucky ticket sign seminar lucky ticket far Gerald know Pollard attend daily 7 pm famous institute commute tram m day in tram ticket digit and Gerald want surprise Pollard day Pollard receive tram klucky ticket the conductor agree Pollard certain ticket m day want Gerald tell kind ticket in regard help Gerald pick exactly m distinct klucky ticket