#include<iostream>
#include<string>

using namespace std;
pair<int, string> longestsubstr(const string & str);
int main()
{
	string s = "aaaaa";
	pair<int, string> p;
	p = longestsubstr(s);

	cout << p.first << " " << p.second << endl;
	return 0;
}

pair<int, string> longestsubstr(const string & str)
{
	int len = str.size();
	int i;
	string substr;

	for (i = len - 1; i > 0; i--)
	{
		for (int j = 0; j + i < len; j++)
		{
			string temp = str.substr(j, i);
			int t = str.find(temp);
			int k = str.rfind(temp);
			if (t != k)
				return make_pair(t, temp);
		}
	}

	return make_pair(0, "");
}