//#include <math.h>
#include <stdio.h>
#include <iostream>
#include <vector>

using namespace std;

int main(void)
{
	string line;
	while (cin.good()) {
		int count;
		vector<int> cmds;
		cin >> count;
		if (cin.eof()) break;
		for (int i = 0; i < count; i++) {
			int cmd;
			cin >> cmd;
			cmds.push_back(cmd);
		}

		vector<long long int[2]> hors, vers;
		long long int starting[2] = {0,0}, ending[2];
		int direction = 0;	// ↑→↓←
	}	// ↑→↓←
	cout << "3" << endl << "OK" << "5" << endl;
	return 0;
}