begin

 if (x>100) and (y<200) then

 writeln("ДА");

else

writeln("НЕТ")

end.

Sure! Here is the code snippet you provided written in a more structured way:

```pascal
begin
if (x > 100) and (y < 200) then
writeln('ДА')
else
writeln('НЕТ');
end.
```

This Pascal code checks if the value of variable `x` is greater than 100 and the value of variable `y` is less than 200. If both conditions are true, it will output "ДА" (YES); otherwise, it will output "НЕТ" (NO).