02.sh - aoc22 - 2022 Advent of Code
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       ---
       02.sh (616B)
       ---
            1 #!/bin/sh
            2 
            3 common=0
            4 
            5 while read -r line; do
            6         range0="${line%,*}"
            7         min0="${range0%-*}"
            8         max0="${range0#*-}"
            9 
           10         range1="${line#*,}"
           11         min1="${range1%-*}"
           12         max1="${range1#*-}"
           13 
           14         if [ "$min1" -ge "$min0" ] && [ "$min1" -le "$max0" ]; then
           15                 common="$(( common + 1 ))"
           16                 continue
           17         fi
           18 
           19         if [ "$max1" -ge "$min0" ] && [ "$max1" -le "$max0" ]; then
           20                 common="$(( common + 1 ))"
           21                 continue
           22         fi
           23 
           24         if [ "$min0" -ge "$min1" ] && [ "$min0" -le "$max1" ]; then
           25                 common="$(( common + 1 ))"
           26                 continue
           27         fi
           28 
           29         if [ "$max0" -ge "$min1" ] && [ "$max0" -le "$max1" ]; then
           30                 common="$(( common + 1 ))"
           31                 continue
           32         fi
           33 done
           34 
           35 echo "$common"