Advent of Code 2024 Day 2 - Bash

aoc_2024_d2_solve1.sh

#!/bin/bash
# cat input.txt | ./solve1.sh

while read -r rpt; do
    echo "$rpt" |
        sed 's/\s\+/\n/g' |
        sort -n |
        xargs |
        while read -r srt; do
            echo "$rpt" |
                sed 's/\s\+/\n/g' |
                sort -n -r |
                xargs |
                while read -r uns; do
                    [ "$srt" == "$rpt" ] || [ "$uns" == "$rpt" ] && echo "$rpt"
                done
        done |
        while read -r; do
            echo "$rpt" |
                sed 's/\s\+/\n/g' |
                wc -l |
                while read -r len; do
                    for i in $(seq 1 $len); do
                        echo "$rpt" |
                            sed 's/\s\+/\n/g' |
                            tail -n+$i |
                            head -2 |
                            xargs -L2 |
                            awk '$2' |
                            awk '{printf "%s-%s\n", $2, $1}' |
                            while read -r math; do
                                echo $(($math))
                            done |
                            awk '$1 > 3 || $1 == 0 || $1 < -3'
                    done
                done |
                wc -l |
                while read -r bads; do
                    [ "$bads" == "0" ] && echo "$rpt"
                done
        done
done |
    wc -l

aoc_2024_d2_solve2.sh

#!/bin/bash
# cat input.txt | ./solve2.sh

while read -r all; do
    echo "$all" |
        sed 's/\s\+/\n/g' |
        wc -l |
        while read -r len; do
            for i in $(seq 1 $(($len+1))); do
                echo "$all" |
                    sed 's/\s\+/\n/g' |
                    sed "$i"d |
                    xargs |
                    while read -r rpt; do
                        echo "$rpt" |
                            sed 's/\s\+/\n/g' |
                            sort -n |
                            xargs |
                            while read -r srt; do
                                echo "$rpt" |
                                    sed 's/\s\+/\n/g' |
                                    sort -n -r |
                                    xargs |
                                    while read -r uns; do
                                        [ "$srt" == "$rpt" ] || [ "$uns" == "$rpt" ] && echo "$rpt"
                                    done
                            done |
                            while read -r; do
                                echo "$rpt" |
                                    sed 's/\s\+/\n/g' |
                                    wc -l |
                                    while read -r len; do
                                        for i in $(seq 1 $len); do
                                            echo "$rpt" |
                                                sed 's/\s\+/\n/g' |
                                                tail -n+$i |
                                                head -2 |
                                                xargs -L2 |
                                                awk '$2' |
                                                awk '{printf "%s-%s\n", $2, $1}' |
                                                while read -r math; do
                                                    echo $(($math))
                                                done |
                                                awk '$1 > 3 || $1 == 0 || $1 < -3'
                                        done
                                    done |
                                    wc -l |
                                    while read -r bads; do
                                        [ "$bads" == "0" ] && echo "$rpt"
                                    done
                            done
                    done
            done | wc -l |
                while read -r valids; do
                    [ "$valids" != "0" ] && echo "$all"
                done
        done
done |
    wc -l

example.txt

7 6 4 2 1
1 2 7 8 9
9 7 6 2 1
1 3 2 4 5
8 6 4 4 1
1 3 6 7 9