program rew2;
var a,b,c,d:real;
begin
write ('vedite storonu'); readln (a,b,c,d);
if (a/b=c/d) then writeln ('podobni') else writeln ('ne podobni');
readln;
end.
program rew2;
var a,b,c,d:real;
begin
write ('vedite storonu'); readln (a,b,c,d);
if (a/b=c/d) then writeln ('podobni') else writeln ('ne podobni');
readln;
end.