良心题目，不用脑子即可AC

#include<bits/stdc++.h>
using namespace std;
int n, pos;
string s, tmp, ans;
int main()
{
	cin >> n;
	for(int i = 1;i <= (n + 71) / 72;i++)
		cin >> tmp, s += tmp;
	ans = s;
	s += s;
	for(int i = 0;i < n;i++)
	{
		string k = s.substr(i, 8);
		if(ans > k)
			ans = k, pos = i;
	}
	cout << pos;
	return 0;
}