33 lines
688 B
Bash
Executable File
33 lines
688 B
Bash
Executable File
#!/bin/bash
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#
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# ex1.bash: Advent2020 game, day 16/game 1.
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CMD=${0##*/}
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#shopt -s extglob
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declare -A VALID=()
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declare -i state=0 res=0
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while read -r line; do
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if [[ $line =~ ^([a-z :]+)([0-9]+)-([0-9]+)([a-z ]+)([0-9]+)-([0-9]+)$ ]]; then
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n1=$(seq "${BASH_REMATCH[2]}" "${BASH_REMATCH[3]}")
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n2=$(seq "${BASH_REMATCH[5]}" "${BASH_REMATCH[6]}")
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for i in $n1 $n2; do
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VALID[$i]=1
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done
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elif [[ $line =~ (your ticket:|nearby tickets) ]]; then
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((state++))
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elif [[ $line != "" ]]; then
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if ((state == 2)); then
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for i in ${line//,/ }; do
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# shellcheck disable=SC2100
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[[ ! -v VALID[$i] ]] && res=res+i
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done
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fi
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fi
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done
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printf "%s : res=%d\n" "$CMD" "$res"
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exit 0
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