#!/usr/bin/env python # -*- coding: utf-8 -*- import sys n=int(input()) l=raw_input().split() k=0 m=0 p=0 j=0 x=0 a=[] for i in range (0,n): if l[i]=="+": p=p+1 elif l[i]=="-": m=m+1 else: a.append(int(l[i])) a.sort() for i in range (0,len(a)): if i