42 lines
879 B
Bash
42 lines
879 B
Bash
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#!/usr/bin/env bash
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set -o errexit
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set -o nounset
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set -o pipefail
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if [[ "${TRACE-0}" == "1" ]]; then
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set -o xtrace
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fi
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cd "$(dirname "$0")"
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main ()
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{
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declare -i sum=0
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while read -r line; do
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declare -a winning=() mine=() mywinning=()
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declare -i card_sum=0
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stripped=$(sed 's/Card\s\{1,3\}[0-9]\{1,3\}: //' <<< "${line}")
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winning+=($(cut -d '|' -f 1 <<< "${stripped}"))
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mine+=($(cut -d '|' -f 2 <<< "${stripped}"))
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for number in "${mine[@]}"; do
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for w in "${winning[@]}"; do
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if [[ ${number} -eq ${w} ]]; then
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mywinning+=("${number}")
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break
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fi
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done
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done
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for number in "${mywinning[@]}"; do
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if [[ card_sum -eq 0 ]]; then
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card_sum=$((card_sum+1))
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else
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card_sum=$((card_sum*2))
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fi
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done
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sum=$((sum+card_sum))
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done < input.txt
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echo "${sum}"
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}
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main "$@"
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