proram bai1;
var s,i:longint;
begin
s:=0;
for i:=1 to 200 do
if i mod 2=0 then s:=s+i;
write('S= ',s);
readln
end.
Program Tinhtongsole;
Uses Crt;
Var i, Tong: longint;
Begin
Clrscr;
Tong:=0;
For i := 1 to 199 do
If i mod 2 = 0 then;
Tong:= Tong+i;
Writeln('Ket qua',Tong);
Readln;
End.
Program viet_chuong_trinh_tinh_tong;
Uses Crt;
Var i,s:integer;
Begin
Clrscr;
i:=2;
While (i>1) and (i<=100) do
Begin
s:=s+i;
i:=i+2;
End;
Writeln(S);
Readln;
End.