#include <iostream>
#include <cstdlib>
using namespace std;

//Flag of Ukraine.
//Run it like this:     ./a.out | /usr/bin/pnmtopng > ukraine.png
//                      ls -l
//                      file ukraine.png
//                      cp ukraine.png public_html

int main()
{
	int nrows {60};   //number of rows of pixels
	int ncols {90};   //number of columns of pixels

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

	for (int row {0}; row < nrows; ++row) {
		for (int col {0}; col < ncols; ++col) {
			if (row < 20) 
			{
				cout << "255 255 0\n";
			}
			  else if (row < 40)
			{
				cout << "0 0 255\n";    //upper half is blue
		        } else {
				cout << "255 0 0\n";   //lower half is yellow
			}
		}
	}

	return EXIT_SUCCESS;
}