st=>start: get news
e=>end: end
init=>operation: x=0;
                 i=0;
                 y=0;
downtime=>operation: downtime
count_device=>operation: count near smartphone
compare_device_count=>condition: Is there a significant rate increase of
                                    device's count compared with last time?
save_devices_count=>operation: save device's count
init_i=>operation: i=0;
random_sample=>operation: Selects a smartphone at random
did_you_have_some_news=>condition: Has been it get the news already?
sending=>operation: send completely;
                    x++;
compare_x_X=>condition: x>=X; | comparexX
i_plus=>operation: i++;
compare_i_n=>condition: i>=n;
y_plus=>operation: y++;
compare_y_Y=>condition: y<Y;
noop=>operation: noop to graph;
st->init->downtime->count_device->compare_device_count
compare_device_count(yes)->init_i
compare_device_count(no)->save_devices_count
save_devices_count(right)->downtime
init_i->random_sample->did_you_have_some_news
did_you_have_some_news(no)->sending->compare_x_X
did_you_have_some_news(yes)->i_plus->compare_i_n
compare_x_X(yes)->e
compare_x_X(no,right)->init_i
compare_i_n(yes)->y_plus->compare_y_Y
compare_i_n(no)->noop(right)->random_sample
compare_y_Y(no)->save_devices_count
compare_y_Y(yes)->e