$e=1e18|0;
($n,@b)=<>;
@a=1;
for(0..1){
	$m=$o=$a[0];
	for(0..$#b){
		$v=$a[$_+1]=($b[$_]-$a[$_])*(-1)**$_;
		$v=$e+1-$v if $_%4==1||$_%4==2;
		$m=$v if $m>$v;
		$o=$v if $o<$v;
	}
	if($m<1){
		$a[0]+=1-$m;
	}elsif($o>$e){
		$a[0]-=$o-$e;
	}else{
		print join$/,$n+1,@a;
		exit;
	}
	last if $a[0]<1||$a[0]>$e;
}
print -1;