The Montreal Canadiens felt both after ending their first-round playoff series against the Ottawa Senators. Carey Price made 43 saves, Brendan Gallagher scored in the first period, and the Canadiens won 2-0 Sunday night to advance to the second round of the NHL playoffs. Max Pacioretty sealed the win with an empty-net goal with 1 second remaining. ''Price stepped up and he was the difference,'' Montreal defenseman P.K. Subban.