Advent of Code 2024 Day 1 - Bash

aoc_2024_d1_solve1.sh

#!/bin/bash

dbg="+x"
set "$dbg"
in="$1"

awk '{print $1}' "$in" |\
    sort |\
    nl -bt -nln |\
    xargs -I '{}' bash $dbg -c "\\
        awk '{print \$2}' \"$in\" |\\
        sort |\\
        tail -n+\$(\\
            echo -n '{}' | awk '{printf \$1}'\\
        ) |\\
        head -1 |\\
        awk \"{printf \\\"\\
            (\$(echo -n {} | cut -d' ' -f2)-%s)\\\", \\\$1\\
        }\" |\\
        xargs -I '@@' bash $dbg -c '\\
            echo \$(@@) |\\
            tr -d -
        '
    " |\
    xargs |\
    sed -e 's/\ /+/g' |\
    xargs -I '{}' bash $dbg -c 'echo $(({}))'

aoc_2024_d1_solve2.sh

#!/bin/bash

dbg="+x"
set "$dbg"
in="$1"

awk '{print $1}' "$1" |\
    xargs -I '{}' bash $dbg -c "\\
        awk '\$2 == \"{}\"' \"$in\" |\\
        wc -l |\\
        xargs -0 printf \"{}*%s\"
    " |\
    xargs |\
    sed -e 's/\ /+/g' |\
    xargs -I '{}' bash $dbg -c 'echo $(({}))'

example.txt

3   4
4   3
2   5
1   3
3   9
3   3