Original: In addition to the Central Europe countries , the drainage basin includes parts of nine more countries : Italy ( 0.15 % ) , Poland ( 0.09 % ) , Switzerland ( 0.32 % ) , the Czech Republic ( 2.5 % ) , Slovenia ( 2.2 % ) , Bosnia and Herzegovina ( 4.8 % ) , the Republic of Macedonia , and Albania ( 0.03 % ) .
Simplified: Bigger cities include Ulm , Regensburg in Germany ; Linz , Vienna in Austria ; Bratislava in Slovakia , Budapest in Hungary ; Novi Sad and Belgrade in Serbia .