33 lines
1.0 KiB
Bash
Executable File
33 lines
1.0 KiB
Bash
Executable File
#!/bin/sh
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set -eu
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# "oneline" versions follow each function
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part1() {
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# 3,1 6,2 0,3 0,1 3,2 6,3 6,1 0,2 3,3
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set -- 4 8 3 1 5 9 7 2 6
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sort 02_input | uniq -c | awk '{print $1}' | while read l; do
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printf "$l" | sed s/$/*$1+/ # if you go for the less magic-numbery version you can do sed "s/$/*(${1%,*}+${1#*,})/"
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shift
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done | sed s/+$/\\n/ | bc
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}
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# set -- 4 8 3 1 5 9 7 2 6; sort 02_input | uniq -c | awk '{print $1}' | while read l; do printf "$l" | sed s/$/*$1+/; shift; done | sed s/+$/\\n/ | bc
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part2() {
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# 0,3 3,1 6,2 0,1 3,2 6,3 0,2 3,3 6,1
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set -- 3 4 8 1 5 9 2 6 7
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sort 02_input | uniq -c | awk '{print $1}' | while read l; do
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printf "$l" | sed s/$/*$1+/ # same comment as before
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shift
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done | sed s/+$/\\n/ | bc
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}
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# set -- 3 4 8 1 5 9 2 6 7; sort 02_input | uniq -c | awk '{print $1}' | while read l; do printf "$l" | sed s/$/*$1+/; shift; done | sed s/+$/\\n/ | bc
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while getopts :12 OPT; do
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case $OPT in
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1) part1 && exit 0 ;;
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2) part2 && exit 0 ;;
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*) echo "bad option" 1>&2; exit 1 ;;
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esac
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done
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