<>;map{printf'compare =%3d swap =%3d data:'.'%3d'x@_.$/,++$#,$-+=$_[$==--$_]<$_[--$_]&&(@_[$_,$=]=@_[$=,$_],1),@_}2..--$.for@_=<>
Note that non-ascii characters in the above source code will be escaped (such as \x9f).
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