59 lines
841 B
Bash
Executable File
59 lines
841 B
Bash
Executable File
#!/bin/bash
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#
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# ex2.bash: Advent2020 game, day 6/game 2.
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CMD=${0##*/}
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shopt -s extglob
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declare -A Q=()
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function reset_array() {
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for elt in {a..z}; do
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Q[$elt]=0
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done
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}
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function count_array() {
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local -i count=0 people="$1"
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for elt in "${!Q[@]}"; do
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if (( Q[$elt] == people )); then
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((count++))
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fi
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done
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echo $count
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}
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function set_array() {
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local str="$1"
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local c
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for ((i=0; i<${#str}; ++i)); do
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c=${str:$i:1}
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if [[ "$c" =~ [a-z] ]]; then
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(( Q[$c]++ ))
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fi
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done
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}
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declare -i people=0 group=0 count=0
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function calcgroup() {
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local -i i
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i=$(count_array $people)
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((group++))
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(( count += i ))
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((people=0))
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reset_array
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}
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while read -r line; do
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if [[ -z "$line" ]]; then
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calcgroup
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continue
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fi
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((people++))
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set_array "$line"
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done
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calcgroup
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printf "%s : groups=%d count=%d\n" "$CMD" $group $count
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exit 0
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