var
a,sum:Integer;
begin
readln(a);
sum:=0;
while a mod 2 <> 0 do
sum:=sum+a;
end;
writeln('sum=',sum);
end.
var
a,sum:Integer;
begin
readln(a);
sum:=0;
while a mod 2 <> 0 do
begin
sum:=sum+a;
readln(a);
end;
writeln('sum=',sum);
end.