Which country has a coastline along the Baltic Sea?

Which European landlocked country is home to the High Tatras mountain range? Which country has the shortest coastline in the world? Which country has the coastline along the Adriatic Sea? Which country has a coastline along the Persian Gulf? Which country has the coastline along the Black Sea? Which country has the longest coastline in the world? Which country has a coastline on the Adriatic Sea? Which country is home to the world's longest sandy beach?