Asked at G-Research, Man AHL
Theory: Quant Python That Survives ReviewRead the problem, hints and solution here. The editor needs a bigger screen: open this page on a laptop to write and run your code.
xxxxxxxxx xxxxx_xxxxxx(x, x, xxxxxx, xxxxx_x), xxxxx x xxx x xxx xxx
xxxxxxx xxxxx xxxxxx. xx xxxxxx x xxxxx xxxxx xx xxxxx xxxxx: xxx xxxxx xxxxx
xxxxx xxxx x xxxxxxxxxx, xxx xxxxxx xx xxxx xxxxxxxxxx'x xxxxxxxx, xxx xxx
xxxxxx xx x x-xxxxx xxxx xxxx xxxx xxxx xxxxxxxxx.
xxxx xxx: xxx xxxxxxxx xxxxx xxxxxxx xx x xx x xxxx xxx xxxxx xxxxxx.
[ xxxx = xxxx{xxx_x (x_x - xxx x)(x_x - xxx x)}{xxx_x (x_x - xxx x)^x}, xxxxx xxxxx = xxx x - xxxx , xxx x ] xxxxx ( xxxx ) xx xxx xxxxx xxxxx: xxx xxxx xx x xx xxxxxx xxxx ( xxxx ) xxxxx xx x.
xxxx xxx: xxx xxxxxx xx xxx xxxxxxxx ( x_x = x_x - xxxxx - xxxx , x_x ).
xxxx xxxxx: xxx xxxxxxx x-xxxxx xx xxx xxxxxx xxxx xxx xxxx xxxxxx
xxxxxxxxxxxx, xxx xxxxxxx xxx xxxxxxxx:
[ x_x = xxxx{x_x - x_x}{xxxxx_x} ] xxxxx ( x_x ) xx xxx xxxx xxx
( xxxxx_x ) xxx xxxxxxxxxx xxxxxxxx xxxxxxxxx (xxxxxx xx xxxxxx,
xxx xxxxxx - x) xx ( x_{x-xxxxxx+x}, xxxxx, x_x ). xxx xxxxx
xxxxxx - x xxxxxxxxxxxx xxxx xx xxxx xxxxxx xxx xx x-xxxxx. xxxx
( xxxxx_x < xx^{-x} ) (xxxxx xxxxxxxx xxxxxxx xxxx) xxx x-xxxxx xx x.
xxxxxx (xxxx, xxxxx, xxxxxxx): xxxx xxx xxxxx xxxxxxx xx x xxxxxxxx
xx xxxxx xxxxxx xxxxxx, xxx xxxxxxx x xxxx xx xxxx, xxx xxx xxxxxxxxxxx:
-x xxxx ( x_x > xxxxx_x ) (xxx xxxxxx xx xxxx: xxxxx x, xxxx
( xxxx ) xx x), +x xxxx ( x_x < -xxxxx_x ) (xxx xxxxxx xx
xxxxx), xxx x xxxxxxxxx, xxxxxxxxx xxxxx xxxxxxxxxxx xxxxxxx x x-xxxxx.
xxxxx_xxxxxx([xx.x, xx.x, xx.x, xx.x, xx.x, xx.x, xx.x, xx.x, xx.x, xx.x],
[x.x, x.x, x.x, x.x, x.x, xx.x, xx.x, xx.x, xx.x, xx.x], x, x.x)
# (x.xxxxx, x.xxxxxx, [x, x, x, x, x, -x, x, -x, x, x])
xxxxx_xxxxxx([x.x, x.x, x.x, xx.x, xx.x, xx.x],
[x.x, x.x, x.x, x.x, x.x, x.x], x, x.x)
# (x.x, x.x, [x, x, x, x, x, x])
xx xxx xxxxx, xxx xxxxx xxxxx xxxxxxxxxxxx xxxx xx xxxxxx xx xxxx, xxx
xxxx xxx xxxxxx xx xxx xxxxxx xxxxx xxxxxxxx xxx xxxxxx xxxx xxxx xxxx xxx
xxxxxxxxx xxxx xxx xxxxxx xxxx. xx xxx xxxxxx, x xx xxxxxxx xx + x xxx
xxxxxxx xxxxx.
x <= xxx(x) == xxx(x) <= x * xx^x, x xx xxx xxxxxxxx, xxxxxx >= x
xxx xxxxx_x >= x. x xxxxxx xxxxxx xxxx xxx xxxxxx xxxxx xxx-xxxx
xxxxxxx, xxxx xxxx xxx xxxxx xxxxx xxxxxx.xxxx=x) xxxxxxx xxxxx x-xxxxx xxx xxxxx x xxxxxx
xx x xxxxxx xxxx. xxx xxxxxxxxxxx xxx xxxxxx, xx xxxx xxxxx_x = x xxxxx
xxxxxxx x-xxxxx xxxxx.This problem is only available to subscribers.