VAR
k: LongInt;
BEGIN
k := 50;
While (k < 1000) do begin </em>
k := k + 50; Write(k, ' ');
End;
END.
VAR
kol, k: LongInt;
BEGIN
k := 20; kol := 0;
While (k <= 60) do begin</em>
kol := kol + 1;
k := k + 2;
End;
Writeln(kol);
END.
VAR
sum, k: LongInt;
BEGIN
k := 101; sum := 0;
While (k < 150) do begin</em>
sum := sum + k;
k := k + 2;
End;
Writeln(sum);
END.