var a,b,c:integer;
Begin
read(a,b,c);
if a>=0 then writeln(a);
if b>=0 then writeln(b);
if c>=0 then writeln(c);
End.
var a,b,c:integer;
Begin
read(a,b,c);
if a>=0 then writeln(a);
if b>=0 then writeln(b);
if c>=0 then writeln(c);
End.