#include <iostream>
#include <fstream>
#include <windows.h>
using namespace std;


int main()
{
	ofstream fol("C:/abc/ab/a.txt");
	if(fol.fail())
	{
		cout << "creating...\n";
system("mkdir C:\\abc\\ab");
ofstream fol("C:/abc/ab/a.txt");
return main();
	}
	else
	cout << "exist\n";
}