Meeting-Room Exchanges

xxxx xxxx xxxxxx xxxxxxx xxxxxxxx xx xx xxxxxxxx xxxxxxxxxx xxxx. xxxx xxxxxxx xxx xxxxx xxx xxxxxxxxxxxx xxxxxx xx x xxxx: x xxxxxxxx xxxxx xxx xxxxxxx xxx x xxxx-xxxx xxxxxxxx (xxxxx, xxx) (xxx xxxxxxxxx), xxx xxx xxxxxx xxx xxxxxx xxxx xxx xxxxxxx xxx xx xxxxxx xx xxxxxxx xxxxxxxx, xxxx xxx xxxxxxxx xx xxxxxxx xxxx xxxxxxxxx. xxxxxxxx xxxx xxxx xxxxx xxx xxxxx, xx xxx xxxxxxxxxxxxxx xxxx xxxxx xxx xxxxxxx xxxxxx xxxx xxxxxx xxx xxxxx xxxxxxx xxxxxxxx.

xxxxxxxxx xxx_xxxxxxx_xxxxxxxx(xxxxxxx) xxxxxxxxx xxx xxxxxxx xxxxxx xx xxxxxxxx xxxxxx xx xxxx xxxxx xxxxxx (xxxxx, xxx) xxxx x xxxxxxx xxx xxx xxxx xxxxxxxx xxx xx xxxxxxx xxxxxxx xxx xxxxxxxxxxx xxxxxxx.

xxxxxxxx

xxx_xxxxxxx_xxxxxxxx([(x, xx), (x, xx), (xx, xx)])
# x  (xxx xxxxxxx xxxxx (x, xx); x xxxxxx xxxxxx (x, xx) xxx xxxx (xx, xx))

xxx_xxxxxxx_xxxxxxxx([(x, xx), (x, x)])
# x  (xxx xxxxxxx xx xxx xxxxxxx, xxx xxxxxxx xxxxxxx xxxx)

xxxxxxxxxxx

• xx xx (x xxxxx xx^x) xxxxxxx xxxx x <= xxxxx < xxx <= xx^x.
• xxx xx xxxxxxxxx: x xxxxxx xxxxxx xx (x) xxx xxx xxxxxxxx xx (x) xxx xxxxx x xxxxxxx. xx xxxxx xxxx xxxxxxx x.
• xxxxxxxxx xxxxx xxxxxx xxxxxxx xxxxx xxxxx xx xxxxxxxxx xxx xxxx xxx xxxxxx xx xxxx xx xxx xxxxxxx xxxxxx xxxx; xxxxx xxxxxxx, xxx xxxx-xxxxxx xxxx xxxxxxxxx xxxxxxx "xx xxx xxxxxxx xxxx?" xx xxxxxxxxxxx xxxx.