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

//this output is a flag consisting of five vertical stripes of the same size.

int main()
{
        const int nrows {100};   //number of rows of pixels
        const int ncols {125};   //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 (col < ncols/5) {
                                cout <<"0 0 0\n";    //left end is black
                        } else if (col < ncols*2/5) {
                                cout << "255 255 255\n"; //left middle is white
                        } else if (col < ncols*3/5) {
                                cout << "0 0 0\n";   //middle center is black
			} else if (col < ncols*4/5) {
				cout << "255 255 255\n";	//right middle is white
			} else {
				cout << "0 0 0\n";	//right end is black
                        }
                }
        }

        return EXIT_SUCCESS;
}