Part 1 solution for day 5

2024/day-5/solution-1.sh

@@ -0,0 +1,36 @@
+#!/usr/bin/env bash
+
+while read -r LINE
+do
+  GREP_EXPR=$( printf "%s"  "$LINE" | tr ',' '|' )
+  PASS_RULES=0
+  # Loop through rules and find a breaking rule
+  while read -r RULE
+  do
+    GREPC=$( printf "%s" "$LINE" | grep -c "$RULE" ) 
+    if [[ $GREPC -ne 1 ]]
+    then
+      #printf "%s rule violated for %s \n" "$RULE" "$LINE"
+      PASS_RULES=1
+      break
+    fi
+  # Filter rules that only has included pages
+  done <<< "$( < input-rules grep -E "($GREP_EXPR)\\|($GREP_EXPR)" | sed 's/|/,.*/')" 
+  # All rules have passed
+  if [[ $PASS_RULES -eq 0 ]]
+  then
+    printf "%s\n" "$LINE"
+  fi
+done < input-updates |
+  tr ',' ' ' |
+  awk '
+  BEGIN{ total = 0 } 
+  {
+    if (NF % 2 == 1) {
+      idx = int( NF / 2 ) + 1
+    } else {
+      idx = NF / 2
+    }
+    total += $idx
+  } 
+  END{ print total }'