Update regex

2024-12-04 22:15:25 +08:00
parent 486afb7a1b
commit c1b917059b
2 changed files with 3 additions and 4 deletions
--- a/2024/day-4/solution-2.sh
+++ b/2024/day-4/solution-2.sh
@ -4,7 +4,6 @@ paste -s -d '' input.txt |
  perl -lne '
    print "$1$4$2$3" 
    while 
-      /(?<=(.).)(?<=(.).{138})A(?=.{138}(.))(?=.(.))/g
+      /(?<=(.).(.).{138})A(?=.{138}(.).(.))/g
  ' | 
-  grep -Eo '(SM|MS){2}' | 
-  wc -l
+  grep -Ec '(SM|MS){2}'