a motorcade n truck drive city z city З approach tunnel know Tunnel Horror among truck driver rumour monster DravDe hunt driver tunnel some driver fear let consider general case each truck describe number v value truck passanger cargo c passanger truck driver include l total people tunnel truck driver overcome fear monster appear motorcade hell eat r total people follow truck driver overcome fear monster appear motorcade hell eat since road narrow impossible escape DravDe appear moreover motorcade can not rearrange the order truck can not change possible truck motorcade leave near tunnel indefinite period you head motorcade remove truck rest motorcade tunnel total left truck value maximal