w->rb_color = RB_BLACK; pa[k - 1]->rb_color = RB_RED; pa[k - 1]->rb_link[1] = w->rb_link[0]; w->rb_link[0] = pa[k - 1]; pa[k - 2]->rb_link[da[k - 2]] = w; pa[k] = pa[k - 1]; da[k] = 0; pa[k - 1] = w; k++; w = pa[k - 1]->rb_link[1];