acm 2020 map 逆向输出

#include <iostream>
#include <map>
#include <math.h>

using namespace std;

int main()
{
    map<int, int> numberMap;
    int number, i,a,b;
    while (cin >> number && number != 0)
    {
        for ( i = 0; i < number; i++)
        {
            cin >> b;
            a = abs(b);
            numberMap.insert(pair<int, int>(a,b));
        }
        i = 0;
        for (map<int, int>::reverse_iterator num = numberMap.rbegin(); num != numberMap.rend(); num++)
        {
            if (i != numberMap.size()-1)
            {
                cout << num->second << " ";
            }
            else
            {
                cout << num->second << endl;
            }
            i++;
        }
        numberMap.clear();
    }

}