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Available in Python and C++. You are solving it in C++. Switch to Python
xxxxxxxxx xxxxx_xxxxxxx(xxxx, xxxx), xxxxx xxxxx xxx xxxxxx xx x xxxxx
xxxxxxx xxx xxxxxxx xxx xxx xxxxx xx xxxxx xxxx xxxxx, xxx xxxxxx xxxx xxxxxx
xxxxx xxx xxx xxxxxxxxx.
xx x xxxxx xxxxxxx (xxx xxxxxxx xxx xxxxxxx xxxxxxx) xxx xxxxxx xxx xxxxxx, xxx xxxxxxxx xxxxx xx xxxxxxxx, xxx xxxxxxxxxx xxxxxxxxx xxxxxx xx xxxx xxxxxx xxxxx.
xxx xxxxxxx xxxx xx xxx xxxxxxxxx xx xxxxx xxxxxx, xxxx xxxxx x xxxxx xxx x xxxxxxxx:
xxxx: xxxx xxxxxxx xx xxx xxx xx xxx xxxxxxxx xxxxx xx xx xxx xxxxxxxxx
xxxxx.xxxx: xxxx xxxxxxx xx xxxx xxx xx xxx xxxxxxxx xxxxx xxxx xx xxx
xxxxxxxxx xxxxx.xx x xxxxxxxxx xxxxxxxx xxxxx (x):
xxxxxx xxx xxxxxxxx xxxxx xxxxx xxx xxxxxx xxxx xxxxxx xx xxx xxxxxx, xx xxxxx xxxxx xx xxxxx:
x. xxxxxxxx xxxxxxxxxx xxxxxx (x(x)); x. xxxxx xxxx, xxxxxxxx xxx xxxxxxxx xxxxxxxxx (|x(x)|); x. xxxxx xxxx: xxxxxx xxx xxxxxx xxxx xxxxx.
xxxxxx xxx xxxxxxxx xxxxx, xxx xxxxxxxx xxxxxx xxx xxx xxxxxxxxx xxx xxx xxxxxx xxxxx, xxxx xxx xxxxxxxxx xxxxxx ((x - x)). xx xxx xxxxxxx xxxxxxxxxx xxxxxx xx x (xxx xxxxxxx xxxx xxx xxxxx), xxxxx xx xx xxxxxxxx xxxxx: xxxxxx xx xxxxx, xxxxxx x xxx xxxxxxxxx x.
xxx::xxxxx<xxx::xxxxxxxx<xxxx xxxx>, xxxx xxxx, xxxx xxxx> xxxxx_xxxxxxx(
xxxxx xxx::xxxxxx<xxx::xxxx<xxxx xxxx, xxxx xxxx>>& xxxx,
xxxxx xxx::xxxxxx<xxx::xxxx<xxxx xxxx, xxxx xxxx>>& xxxx);
xxxx xxxxx xx x {xxxxx, xxx} xxxx xxx xxx xxxxxx xx {xxxxxxxx_xxxxx, xxxxxxxx_xxxxxx, xxxxxxxxx}, xxxx xxx::xxxxxxx xx xxx xxxxx xxxx xxx
xxxxxxx xxxx xxx xxxxx.
xxxxx_xxxxxxx({{xxx, xx}, {xxx, x}}, {{xx, x}, {xxx, x}});
// {xxx, xx, -x}
// xx xxx: xxxxxx xx (xxx xxx xxxx), xxxxxx xx (xxxx xx xx xxx xxx),
// xxxxxx xx. xxxxx xxx xxxx xx xxxxxx xxx xxxxxxxxx; xxx xx xxxxx.
xxxxx_xxxxxxx({{xx, xx}}, {{xxx, xx}});
// {xxx::xxxxxxx, x, x}
// xxxx xxx xx < xxxx xxx xxx: xxxxxxx xxxxxxx xx xxx xxxxx.
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