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

/*      
The outer loop goes through all the rows, from top to bottom.
The inner loop goes through the pixels of each row, from left to right.
*/

int main()
{
        const int miny {-30};     //row number of the bottom row
        const int maxy { 30};     //row number of the top row
	const int minx {-25};     //column number of the leftmost column
        const int maxx { 25};     //column number of the rightmost column

	const int nrows {maxy - miny + 1}; //number of rows of pixels
	const int ncols {maxx - minx + 1}; //number of columns of pixels

	const double radius {.3 * nrows};  //of the red circle

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

        for (int y {maxy}; y >= miny; --y) {
                for (int x {minx}; x <= maxx; ++x) {
			if (sqrt(x*x + y*y) <= radius) {
                                cout << "255 0 0\n";      //in the red circle
                        } else {
                                cout << "255 255 255\n";  //in white background
                        }
                }
        }

        return EXIT_SUCCESS;
}