advent of code 2024 version unix - retour accueil
git clone git://bebou.netlib.re/aoc2024
Log | Files | Refs |
1.solve (620B)
1 #! /bin/sh
2
3 echo "part 1"
4
5 mkfifo left 2> /dev/null
6 < 1.input awk '{print $1}' | sort > left&
7 < 1.input awk '{print $2}' | sort |
8 paste -d'-' left - | grep -Ev '^-$' |
9 bc |
10 tr -d '-' | paste -s -d'+' |
11 bc
12
13 echo "part 2 - fast"
14
15 < 1.input awk '{print $2}' | sort | uniq -c > rightcount
16 < 1.input awk '{print $1}' | sort | grep -v ^$ > leftc
17 < rightcount grep -f leftc | awk '{print $1*$2}' | paste -s -d'+' | bc
18
19 echo "part 2 - slow"
20
21 for e in $(< 1.input tr -s ' ' | cut -f1 -d' ');do
22 echo "$e * $(grep -E "$e$" rightcount | awk '{print $1}')"
23 done | sed 's/* $/*0/' | bc | paste -s -d'+' | bc
24
25 rm rightcount leftc