61 lines
1.5 KiB
Bash
61 lines
1.5 KiB
Bash
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#!/usr/bin/env bash
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FILE=input
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LEN=$( head -1 "$FILE" | sed -E 's/(.)/\1\ /g' | awk '{printf NF}' )
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read -r -a MAP_ARRAY <<< "$( < "$FILE" sed -E 's/(.)/\1\ /g' | paste -s -d ' ' )"
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read -r -a SHADOW_ARRAY <<< "$( < "$FILE" sed -E 's/(.)/\1\ /g' | paste -s -d ' ' )"
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#printf "MAP_LEN: %s, NF: %s\n" "${#MAP_ARRAY[@]}" "$LEN" >&2
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for CHAR in $( < "$FILE" grep -Eo '[^\.]' | sort -u | paste -s -d' ' )
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do
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# Get indices for antennae
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LINE="$(
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for (( i=0; i<${#MAP_ARRAY[@]}; i++ ))
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do
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if [[ ${MAP_ARRAY[i]} == "$CHAR" ]]
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then
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printf "%s " "$i"
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fi
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done
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)"
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printf "%s\n" "$LINE" >&2
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read -r -a IDX_ARRAY <<< "$LINE"
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#printf "idx: %s " "${IDX_ARRAY[@]}" >&2
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#printf "\n" >&2
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# Get all combinations
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for (( i=0; i<${#IDX_ARRAY[@]}-1; i++ ))
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do
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A=${IDX_ARRAY[i]}
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for (( j=i+1; j<${#IDX_ARRAY[@]}; j++ ))
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do
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B=${IDX_ARRAY[j]}
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DIFF=$(( B - A ))
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HEAD=$(( A - DIFF ))
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TAIL=$(( B + DIFF ))
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printf "char: %s, i: %s, j: %s, DIFF: %s, HEAD: %s, TAIL: %s\n" "$CHAR" "$A" "$B" "$DIFF" "$HEAD" "$TAIL" >&2
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for VALUE in $HEAD $TAIL
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do
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if [[ $VALUE -gt ${#MAP_ARRAY[@]} ]] || [[ $VALUE -lt 0 ]]
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then
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continue
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fi
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SHADOW_ARRAY[VALUE]=X # Mark on shadow map
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done
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done
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done
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unset IDX_ARRAY
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done
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COUNT=0
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for (( i=0; i<${#SHADOW_ARRAY[@]}; i++ ))
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do
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if [[ ${SHADOW_ARRAY[i]} == "X" ]]
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then
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(( COUNT++ ))
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fi
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done
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printf "%s\n" "$COUNT"
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printf "%s" "${SHADOW_ARRAY[@]}" | fold -w "$LEN" | sed -E 's/(.)/\1\ /g'
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