Asked at Jump Trading, Hudson River Trading
Theory: Systems and PerformanceRead the problem, hints and solution here. The editor needs a bigger screen: open this page on a laptop to write and run your code.
xxxxxx xxxxxxx xxxx xxxxxxx. xxx xxxx xx x xxxx-xx-xxxxx xxxxxxxxxxxx xx x xxxxxx xx xxxxxxx xxxx xxxxxxxxxxx, xxx xxx xxxxx xxxxxxxx xxxxx xx xxx xxxx: xxx xxxxx xxx xxxxxx xxx xxx xxx xxxx xxxx xxx xxxxxxxxxxxx, xxx xxx xxxxxx xxx xxxx xxxx xx.
xxxxxxxxx xxx xxxx xxxxxxxx xxxxx xxxxxxxxx xxxxx xxxxxx, xxx x xxxx xxxxxxx xxxxxxxx xxxxxxxx xx xxxxxxxx xx xxxx. xx xxx xx xxx xxxx xxx xxxxxxx. xxx xxxx x xxxxxxxxx, xxxxxxxxxxxx x xxxxxxx xxx xxxxxxxxxxx, xxx xxxxxxx xxx xxxxxxxxxxx xxxx xxx xxxxxx.
xxxxxxxxx xxxxxxx_xxxxxxxxxxx(xxxxxxx, xxxxxx).
xxxxxxx: (xxxxxxx_xx, xxxxx) xxxxx, xx xx xxxxxxxxxx xxxxx. xxx xxxx
xxxxxxx xxx xxxxxx xxxx xxxx xxxx xxx xxxx xx xxxxxx; x xxxxx xx x
xxxxxxxxxxx xxxxxxx.xxxxxx: xxx xxxxxxxxxxx xxxxxx, xx xxxxxxxx xx xxxxxxxxxx xx x
xxxxxxx, xx xxxx xx xxx xxxxxx, xxxx xx xxx xxx xxxx xx xxx.xx. xxxx xxx
xxx xxxxxxxxxxx xxxxxx.xxx xxx xxxxxxx xxxx xxxxxxxxxx. xxxx ( x ) xxxxxxx xx xxxxx, xxx xxxxxxxxxx xx xxxxx ( x ) xx xxx xxxxxx xx xxxx
[ x = xxxxxxxxx xxxx{x xxxxx x}{xxxxx} xxxxxxxxxx ]
xxxxxxxx xxxx x xx xxxxxxxxx xxxxx, xxxxxxx xxxx ( [x, x] ). xxxxxx xxx xxxxxxx xx xxxx xxxx xxx xxxx xxxxx, xx xxx xxxxx xxxxx.
xx xxx xxxxx xxxxx xx x, xxxxxx xxxx xxx xxxxx xxxxx.
xxxxxxx = [(xxx, x), (xx, x), (xxx, x), (xxx, x)]
xxxxxxx_xxxxxxxxxxx(xxxxxxx, [xxxx, xxxx, xxxx, xxxxx])
# [xx, xxx, xxx, xxx]
xxxxxxx_xxxxxxxxxxx(xxxxxxx, [x, x])
# [xx, xx]
xxx xxx xxxxxxx xx xxx xxxxx, xxxxxx x xxxxxxx xx xx, x xx xxx xxx x xx xxx, xx ( x = xx ). xxx xxxxxx xx xxxx x, xxxxx xxxxxx xxx xxx xx xxx. xxx xx xxxx x, xxx xxxx xx xxx xxxx. xxx.xx xx xxxx xx, xxx xx xx xxxx: xxxx xxxx xxx xxxxxxx xxxxx xx xxxxxxx xx xxx xxxxxxxxxxxx xxxxx xxxx x xxxxx, xx xxxxx xxxxxxxxxx xxxxx xx xxxxxxx xxx xxxxxxx.
xxxx xx xxx x xxxxx xx xxx xxxxxxxxxx, xx xx xxx xxxxxxxxxx xxxxx xxxxxx. x xxx.xx xxxxxx xxxxx xxxxxxx xxxxx xxx xxxx xxx xxxx xxxx xx,xxx xxxxxxx.
This problem is only available to subscribers.