40 lines
820 B
Bash
Executable File
40 lines
820 B
Bash
Executable File
#!/bin/bash
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#
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# ex1.bash: Advent2020 game, day 22/game 1.
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CMD=${0##*/}
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shopt -s extglob
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set -o noglob
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declare -a cards=() CARDS1=() CARDS2=()
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declare -i count=-1
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while read -r line; do
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case ${line:0:1} in
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P*)
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((count++))
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;;
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[1-9]*)
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cards[$count]+=" $line"
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;;
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esac
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done
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# shellcheck disable=SC2206
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CARDS1=(${cards[0]}) && CARDS2=(${cards[1]})
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while ((${#CARDS1[@]} && ${#CARDS2[@]})); do
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# shellcheck disable=SC2128
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((CARDS1 > CARDS2)) && CARDS1+=("$CARDS1" "$CARDS2") || CARDS2+=("$CARDS2" "$CARDS1")
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CARDS1=("${CARDS1[@]:1}")
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CARDS2=("${CARDS2[@]:1}")
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done
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declare -i n=$((${#CARDS1[@]}+${#CARDS2[@]})) res=0 i
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for i in "${CARDS1[@]}" "${CARDS2[@]}"; do
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((res+=n*i, n--))
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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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