2015/advent2.sh

   1 wrap=0 # part 1
   2 ribbon=0 # part 2
   3 while read line; do
   4     x=${line%%x*}
   5     t=${line#*x}
   6     t=${t%%x*}
   7     if test $t -gt $x; then
   8         y=$t
   9     else
  10         y=$x
  11         x=$t
  12     fi
  13     t=${line##*x}
  14     if test $t -gt $y; then
  15         z=$t
  16     else
  17         z=$y
  18         y=$t
  19     fi
  20     wrap=$(( wrap + 3*x*y + 2*x*z + 2*y*z ))
  21     ribbon=$(( ribbon + 2*(x+y) + x*y*z ))
  22 done
  23 echo $wrap $ribbon