Asked at Two Sigma, WorldQuant
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 xx_xx_xxxxxxx(xxxxxx, xxxxxx, xxxxxxxx). xxx xxxx xxxxxxx xx
xxxxxxx xxx xxxxxxxxxxx xxxxxxxxxxx: xxx xxxxxxxxxxx xxxxxxx xxx xxxxxx xxx
xxx xxxxxx xxxx xxxxxxx xx.
x xxxxxx xxxx xxxxxxxx xxx xxxx xxxx xx xxxxx xxxxxxx xx x xxxx xxxx xxxxx x xxx xx xxxxx xxx xxxxxxxx. x xxxxxx xxxx xxxxx xxxxxxxx xxxx xxxxx xx xxxxx x xxxxx xxxx xx x xxxx xxxx xxxxxx xxxxxx. xxx xxxxx xx xxxxxxxxxx xxxxx xxxxxxx xxxxxxx xxxxx xxxxxxx xxx x&x xx xxxxx xxxxxxxx xxx xxxx xx xxxxx xx xxxxx.
xxxxxx: x xxxx xx xxxxxx, xxx xxx xxxxxxxxxxx.xxxxxx: x xxxx xx xxxxxxxx xxxxxx, xxxxxxx xxxx xxxxxx xx xxxx
xxxxxx[x] xxx xxxxx xx xxx xxxx xx xxxxxx[x].xxxxxxxx: x xxxx xx xxxxxxxx xxxxxxxx, xx xxx xxxxx.xxx xxxx xxxxxxx ( x ) xxx xxxxxxx xxxxxx xx ( x ) xx
[ x_{x,x} = xxxx{x_{x+x}}{x_x} - x, ]
xxxxx xxxxxx xxx xxxxx ( x ) xxxx ( x + x ) xxxxxx xxx xxxxxx. xxx xxxxxxxxxxx xxxxxxxxxxx xx ( x ) xx xxx xxxxxxx xxxxxxxxxxx xxxxxxx ( x_x ) xxx ( x_{x,x} ) xxxx xxx xxxx ( x ). xxxxxx xxx xxxxx xxx xxxxxxx, xx xxx xxxxx xxxxx, xxxx xxxxxxx xx x xxxxxxxx.
x xxxxxxx xxxx xxxxx xxxx x xxxxxx xxxxxx xxx xx xxxxxxxxxx xxxxxxxxxxx,
xxx xxxxxxx xxxx xxx xxxxx xxxxxx xxxx xxx xxxx xxxxxxxx (x xxxxxxxx
xxxxxx, xx xxxxxxx xxxxxxx xxxx xxx xxx xxxxx). xxxxxx x.x xxx xxxxx,
xxx xxxxx xxxxx xx xxxxxx xxx.
xx_xx_xxxxxxx([x.x, x.x, -x.x, x.x, x.x, -x.x, x.x, x.x, -x.x, x.x, x.x, x.x],
[xxx, xxx, xxx, xxx, xxx, xxx, xxx, xxx, xxx, xxx, xxx, xxx],
[x, x, x])
# [x.xxxxx, x.xxxxxx, -x.xxxxx]
xx_xx_xxxxxxx([xxx / xxx - x, xxx / xxx - x, xxx / xxx - x, xxx / xxx - x,
xxx / xxx - x, xxx / xxx - x, xxx / xxx - x, x.x],
[xxx, xxx, xxx, xxx, xxx, xxx, xxx, xxx],
[x, x])
# [x.x, x.xxxxxx]
xxx xxxxx xxxxxx xxxxx xxx xxxx xxx'x xxxx xxxx, xxx xxxx xxx xxxx xxx xxxxxx, xxx xx xxxxx xxxx xx xxxxxxx xxxxxxx. xxx xxxxxx xxxxxx xx xxxxxxx xxx xxxx xxxxxx, xx xxx xxx-xxx xx xx x xx xxxxxxxxxxxx.
xxxxx(xxxxx(x), x).This problem is only available to subscribers.