public void solve() throws IOException {
/* MAIN CODE GOES HERE!!! */
MyQueueOnMyLinkedList q = new MyQueueOnMyLinkedList();
int n = in.nextInt();
for (int i = 0; i < n; i++) {
String s = in.next();
if (s.charAt(0) == '-') {
out.println(q.pop());
} else if (s.charAt(0) == '+') {
q.push(in.nextInt());
}
}
}
