103 lines
1.7 KiB
Bash
103 lines
1.7 KiB
Bash
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#!/usr/bin/env bash
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set -euo pipefail
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firstDigits() {
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sed 's|^[^0-9]*\([0-9]\).*|\1|'
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}
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lastDigits() {
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sed 's|^.*\([0-9]\)[^0-9]*$|\1|'
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}
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sumTensDigits() {
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echo $(("$(xargs -I '{}' echo '{} * 10 +') 0"))
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}
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sumOnesDigits() {
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echo $(("$(xargs -I '{}' echo '{} +') 0"))
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}
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detectDigits() {
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sed '
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s|zero|0|g;
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s|twone|2|g;
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s|one|1|g;
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s|eightwo|8|g;
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s|two|2|g;
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s|eighthree|8|g;
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s|three|3|g;
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s|four|4|g;
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s|five|5|g;
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s|six|6|g;
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s|seven|7|g;
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s|nineight|9|g;
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s|eight|8|g;
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s|nine|9|g
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'
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}
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detectReverseDigits() {
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sed '
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s|enorez|1|g
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s|orez|0|g;
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s|thgieno|8|g;
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s|eno|1|g;
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s|owt|2|g;
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s|thgieerht|8|g;
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s|eerht|3|g;
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s|ruof|4|g;
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s|thgievif|8|g;
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s|evif|5|g;
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s|xis|6|g;
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s|enineves|9|g
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s|neves|7|g;
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s|thgie|8|g;
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s|enin|9|g
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'
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}
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part1 () {
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local input tensSum onesSum
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input=$(cat)
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tensSum=$(<<< "$input" firstDigits | sumTensDigits)
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onesSum=$(<<< "$input" lastDigits | sumOnesDigits)
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echo $(("$tensSum + $onesSum"))
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}
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part2 () {
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local input tensSum onesSum
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input=$(cat)
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tensSum=$(<<< "$input" detectDigits | firstDigits | sumTensDigits)
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onesSum=$(<<< "$input" rev | detectReverseDigits | firstDigits | sumOnesDigits)
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echo $(("$tensSum + $onesSum"))
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}
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main () {
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local input part1Answer part2Answer
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input=$(cat)
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part1Answer=$(part1 <<< "$input")
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echo "Part 1 Answer: $part1Answer"
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part2Answer=$(part2 <<< "$input")
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echo "Part 2 Answer: $part2Answer"
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}
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main
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