program segments;
var i,j:integer;
    a,b:array[-10000]of integer;
begin
readln(n);
for i:=1 to n do
read(a[i]); readln(b[i]);
writeln(n-1);
for i:=1 to n-1 do write(a[i]+b[i],' ');
end.

I don't yet know, who are you, but I already know, that you are FOOL!