program brainly;
var n, i, s1:integer;
s2:real;
p:double;
begin
s1:=0;
p:=1;
for i:=2 to 34 do begin
if(i mod 2=0) then begin
s1:=s1+i;
p:=p*i;
end;
end;
s2:=1;
Write('Dati n:'); readln(n);
Write('S=',s2:2:2,'+');
i:=2;
while(i<>n+1) do begin
s2:=s2+(1/(i*2));
if i=n then
begin
Write('1/',i*2);
end
else begin
Write('1/',i*2, '+');
end;
i:=i+1;
end;
Writeln();
Writeln('S=',s2:2:2);
Writeln('Suma numerelor pare=',s1);
Writeln('Produsul numerelor pare=',p);
end.
