Var a, b, c:integer;
Begin
readln(a, b, c);
writeln(min(min(((min(min(a, b), c)**2+max(a, b)**2)**(1/2)),((min(min(a, b), c)**2+max(a, c)**2)**(1/2))),((min(min(a, b), c)**2+max(b, c)**2)**(1/2))):1:9);
End.