гавно а не жизнь

#include <iostream>
#include <fstream>
#include <vector>
#include <io.h>


using namespace std;

int main()
{
	string str;
	vector <char> text;
	ifstream is;
	cin >> str;
	is.open(str);

	int n = 0;
	for (int i = 0; !is.eof(); i++)
	{
		char s;
		s = is.get();
		text.push_back(s);
		n++;
	}
	is.close();

	for (int j = 0; j < n; j++)
	{
		if ((text[j] >= 'n' || text[j] <= 'z') && (text[j] >= 'N' || text[j] <= 'Z'))
		{
			text[j] -= 13;
		}
		if (text[j] < 'n' || text[j] >= 'a')
		{
			text[j] = text[j] + (13 - (text[j] - 'a'));
		}
		if (text[j] < 'N' || text[j] >= 'A')
		{
			text[j] = text[j] + (13 - (text[j] - 'A'));
		}
	}
	for (int j = 0; j < n; j++)
	{
		cout << text[j];
	}
	return 0;
}