Asked at Citadel Securities
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 xxxxxxxx_xxxxxxx(x, xxxxx, xxxx), xxxxx xxxxxxxxx xx xxxxxxxxxx
xxx xxxxxxxx xxxxxxx xx ( x ) xxxxxxxx xxxxxx xxxxx.
xxxx xxxxxxxxx xxx xx xxxxxxxx xxxxxx xxxx. xx xx xxx xxxx xxxxxxxxx xxxxxx xxxxx "xxxx xxxxxxxx xxx xx ( x ) xxxxx".
x: xxx xxxx xxxxxxxx xxxxxx xxxxxxxxx xxx xxxxxxx xx xxxxx xxxx.xxxxx: xxx xxxx xxxxx xxxxx xxxxxxxxxxx xx xxx.xxxx: xxx xxx xxxx.xxxxxxxx ( xxxxx[xxx(x_x, xxxx, x_x)xxxxx] ) xxx x.x.x. xxxxxxxx xxxxxxx xx xxxxxxxxxx, xxx xxxxxx xxx xxxxxxxx xxxxxxx xx x xxxxxxxx.
xx xxxx xxxx xxxxxx xx xxxxxxxxxxxx, xxxxxx xxxx xxxxx xxxxxxxxx: xxxxxx
xxx xxxxxxxxx xxxx xxxxx.xxxxxx.xxxxxxx_xxx(xxxx), xxxx xxx xxxxx xxxxxx
xx xxx xxxx xx xxx.xxxxxxxx_xxxxxx((xxxxx, x)), xxxx xxx xxxxxxx xx xxxx
xxx, xxx xxxxxxx.
xxxxxxxx_xxxxxxx(x, xxxxxx, x)
# -x.xxxx
xxxxxxxx_xxxxxxx(xx, xxxxxx, xx)
# x.xxxx
xxx xxxxxxx xx xxx xxxx xx xxxx xxx xxxx, xx xxx xxxxx xxxxxxx xxxxxxxxx x xxxx xx xxxx. x xxxxxx xxxx xxxx ( x = xxx ), xxxxx xxx xxxxx ( xxxx{xxx x} ) xxxx xx xxxxx xxxx x.xx xxx xxx xxxxxxxxxx xxxxx xxx xxxx xxx xxxxx xx.
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