public class run { public static void main ( String args[] ) { Robot robot = new Robot (args.length>0? args[0] : ""); int white_index=0; // white pointer int blue_index=0; // blue pointer int red_index=robot.nbins()-1; // red pointer int nb_swaps=0; // swap counter if (red_index <= 0) { robot.report(); return; } while (white_index <= red_index) { switch( robot.peek(white_index) ) { case 'w': white_index++; break; case 'r': robot.swap(blue_index,white_index); blue_index++; white_index++; break; default: case 'b': robot.swap(white_index,red_index); red_index--; break; } } robot.report(); }}