46 lines
1.0 KiB
Bash
46 lines
1.0 KiB
Bash
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#!/usr/bin/env bash
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FILE=input
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read -r -a INPUT_ARRAY <<< "$( sed -E 's/.*X[\+\=]([0-9]+), Y[\+\=]([0-9]+)/\1 \2 /g' < "$FILE" | paste -s -d " " )"
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printf "%s\n" "${INPUT_ARRAY[@]}" >&2
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INPUT_LEN=${#INPUT_ARRAY[@]}
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TOTAL_TOKEN=0
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for (( i=0 ; i < INPUT_LEN; i+=6 ))
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do
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A=${INPUT_ARRAY[i]}
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C=${INPUT_ARRAY[i+1]}
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B=${INPUT_ARRAY[i+2]}
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D=${INPUT_ARRAY[i+3]}
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X=${INPUT_ARRAY[i+4]}
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Y=${INPUT_ARRAY[i+5]}
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I=$(( ( B*Y - D*X ) / ( B*C - D*A ) )) # Button A
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J=$(( ( X - A*I ) / B )) # Button B
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TOKEN=$(( I*3 + J*1 ))
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{
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printf "Answer: I= %s, J= %s\n" "$I" "$J"
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printf "Verify answer : %s to %s, %s to %s\n" "$(( A*I + B*J ))" "$X" "$(( C*I + D*J ))" "$Y"
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printf "Total cost: %s\n" "$(( I*3 + J*1 ))"
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} >&2
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if ! [[ $(( A*I + B*J )) -eq $X ]]
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then
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continue
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elif ! [[ $(( C*I + D*J )) -eq $Y ]]
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then
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continue
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elif [[ $I -lt 1 ]] || [[ $J -lt 1 ]]
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then
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continue
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elif [[ $I -gt 100 ]] || [[ $J -gt 100 ]]
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then
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continue
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else
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(( TOTAL_TOKEN+=TOKEN ))
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fi
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done
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printf "Total token: %s\n" "$TOTAL_TOKEN"
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