/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
 
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
    static void rasterizeLine(boolean[][] img, int x1, int y1, int x2, int y2) {
 
 
       int dy = y2-y1;
       int dx = x2-x1;
 
       double k = (double) dy / dx;
       double y = y1;
 
        for( double x = x1; x <= x2; x++ ){
            img[(int)Math.round(y)][(int)x] = true;
            y = y1 + k;
        }
 
    }
 
	public static void main (String[] args) throws java.lang.Exception
	{
		boolean[][] img = new boolean[11][11];
		rasterizeLine(img, 0, 0, 10, 10);
 
		for (int y = 0; y < img.length; ++y) {
			for (int x = 0; x < img[0].length; ++x) {
				System.out.print(img[y][x] ? "O" : ".");
			}
			System.out.println();
		}
		// your code goes here
	}
}

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