Var i,s : Integer;
Begin
s:=0;
For i:=50 to 80 do If Odd(i) then s:=s+i;
Writeln(s);
s:=0;
i:=50;
While i<=80 do<br> Begin
If Odd(i) then s:=s+i;
Inc(i);
end;
Writeln(s);
s:=0;
i:=50;
Repeat
If Odd(i) then s:=s+i;
Inc(i);
Until i>80;
Writeln(s);
end.