Program hoc24;
Var i,d,n : integer;
T: longint;
Begin
Write('n='); readln(n);
D:=0; t:=0;
For i:=1 to n do
Begin
If i mod 2=0 then
Begin
inc(d);
T:=t+i;
End;
End;
Writeln('co ',d,' so chân trong day');
Write('tong cac so chan trong day la :', t);
Readln
End.