[1181] 단어 정렬

#include <iostream>
#include <algorithm>
#include <vector>
#include <string>
using namespace std;
bool cmp(const string &a, const string &b)
{
	if (a.size() == b.size())
		return a < b;
	return a.size() < b.size();
}
int main()
{
	vector<string> v;
	int n;
	cin >> n;
	for (int i = 0; i < n; i++)
	{
		string str;
		cin >> str;
		v.push_back(str);
	}
		
	vector<string>::iterator iter;
	sort(v.begin(), v.end(), cmp);
	v.erase(unique(v.begin(), v.end()), v.end());
	
	for (iter = v.begin(); iter != v.end(); iter++)
		cout << *iter << endl;
	return 0;
}