#include <iostream>
#include <string>
#include <sstream>
#include <iomanip>
using namespace std;

int main() {
	int i = 10;
	int k = 1;
	for(;;)
	{
		float prev = 0.0f;
		for(int j = 1; j <= i; ++j)
		{
			stringstream ss;
			ss << "0.";
			ss << setfill('0') << setw(k) << j;
			float next;
			ss >> next;
			if(prev == next) return 0;
			prev = next;
		}
		cout << "Works for " << k << " places" << endl;
		i *= 10;
		k++;
	}
	return 0;
}