Cover Array With Restricted Operations by tails (quick) (weakness)

#!perl -pla
@b=split' ',<>;
$x=$y=50;
$x+=$b[$x]==$_ for @F;
$y-=$b[$y]==$_ for reverse@F;
$_=101-$x+$y

Note that non-ascii characters in the above source code will be escaped (such as \x9f).

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