#include <iostream>
#include <cstdlib>

using namespace std;

int main()
{
	const int nrows {300};
	const int ncols {450};
	const int stripewidth {30};

	cout << "P3\n"
		<< ncols << " " << nrows << "\n"
		<< 255 << "\n";

	for (int row {0}; row < nrows; ++row) {
		for (int col {0}; col < ncols; ++col) {
			int diagonal {(row + col) / stripewidth};

			if (diagonal % 2 == 0) {
				cout << "0 0 0\n";
			} else {
				cout << "255 255 255\n";
			}
		}	
	}

	return EXIT_SUCCESS;
}