Day 16 Part 1 Non working

2024/day-16/input

@@ -0,0 +1,141 @@
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+#.#.#.......#.......#.......#.......#...........#...#...#...#.....#.#...#.#.#.#...#.....#.#...#...#...#...#...#.#.....#.....#.#.#.#...#.....#
+#.#.###.#.#.###.#####.###############.#.#.#.#.#.#####.#.###.#######.#.###.#.#.#.#.#.#####.#.###.#####.###.#.###.###.#.#####.###.#.#.###.#.###
+#.....................#.........#.....#...#.#.#.....#...#...........#...#.#.#.#.#...#...............#...#.#.#.......#.....#.#...#...#...#...#
+#.###.###.#.###.#.#.###.#######.#.###.#.###.#.#####.###.#################.#.#.#.#####.#####.#.###.#####.###.#.#.###.#####.#.#.###.#######.#.#
+#...#.....#.....#.#...#...#...#.#.#...#...#...#...#...#...........#.......#.#.#...#...#.......................#.#.......#...#.#...#.........#
+#.#.#####.#######.###.###.#.###.#.#.#.#.#.#######.#.#############.#.#######.#.#####.###.#######.#.#.#########.#.#.#.###.#####.#.#####.#.###.#
+#S#...............................................#.................#.......#...........#.........#...........#.......#...............#.....#
+#############################################################################################################################################

2024/day-16/solution-1.sh

@@ -0,0 +1,196 @@
+#!/usr/bin/env bash
+
+FUNCNEST=99999
+FILE=test-input-1
+
+# Load map
+read -r -a MAP_ARRAY <<< "$( < "$FILE" paste -s -d "" | sed -E 's/(.)(.)/\1 \2 /g' )"
+#read -r -a CHECKPOINT_ARRAY <<< "$( < "$FILE" paste -s -d "" | sed -E 's/(.)(.)/\1 \2 /g' )"
+MAP_WIDTH=$(( $( head -1 "$FILE" | wc -c ) -1 ))
+MAP_LEN=${#MAP_ARRAY[@]}
+MAP_HEIGHT=$( < "$FILE" wc -l )
+printf "Map len: %s Map width: %s Map height: %s\n" "$MAP_LEN" "$MAP_WIDTH" "$MAP_HEIGHT"
+DIR_UP=$(( - MAP_WIDTH ))
+DIR_DOWN=$MAP_WIDTH
+DIR_LEFT=-1
+DIR_RIGHT=1
+
+print_map () {
+  printf "%s " "${MAP_ARRAY[@]}" | fold -w $(( MAP_WIDTH * 2 ))
+  printf "\n"
+}
+
+# Get starting position
+for (( i=0; i<MAP_LEN; i++ ))
+do
+  if [[ ${MAP_ARRAY[$i]} == "S" ]]
+  then
+    START_POSITION=$i
+    MAP_ARRAY[START_POSITION]="X"
+    break
+  fi
+done
+printf "Start position: %s\n" "$START_POSITION"
+
+# Get end position
+for (( i=0; i<MAP_LEN; i++ ))
+do
+  if [[ ${MAP_ARRAY[$i]} == "E" ]]
+  then
+    END_POSITION=$i
+    MAP_ARRAY[END_POSITION]="X"
+    break
+  fi
+done
+printf "End position: %s\n" "$END_POSITION"
+
+print_map
+
+# Mark all checkpoints
+declare -A CHECKPOINT_ARRAY
+CHECKPOINT_ARRAY[$START_POSITION]=0
+for (( i=0; i<MAP_LEN; i++ ))
+do
+  if [[ ${MAP_ARRAY[$i]} != "." ]] ;then continue ;fi
+  STEP=$i
+  ADJ_COUNT=0
+  UP=$(( STEP + DIR_UP ))
+  DOWN=$(( STEP + DIR_DOWN ))
+  LEFT=$(( STEP + DIR_LEFT ))
+  RIGHT=$(( STEP + DIR_RIGHT ))
+  if [[ ${MAP_ARRAY[$UP]} == "." ]] && [[ $UP -gt 0 ]]
+  then
+    (( ADJ_COUNT++ ))
+  fi
+  if [[ ${MAP_ARRAY[$DOWN]} == "." ]] && [[ $DOWN -lt $MAP_LEN ]]
+  then
+    (( ADJ_COUNT++ ))
+  fi
+  if [[ ${MAP_ARRAY[$LEFT]} == "." ]]
+  then
+    (( ADJ_COUNT++ ))
+  fi
+  if [[ ${MAP_ARRAY[$RIGHT]} == "." ]]
+  then
+    (( ADJ_COUNT++ ))
+  fi
+  if [[ $ADJ_COUNT -gt 2 ]]
+  then
+    MAP_ARRAY[STEP]=X
+    CHECKPOINT_ARRAY[$STEP]=0
+  fi
+done
+CHECKPOINT_ARRAY[$END_POSITION]=0
+printf "%s " "${!CHECKPOINT_ARRAY[@]}"
+printf "\n"
+
+# Iterate over checkpoints and print pairings
+declare -A CHECKPOINT_PAIRS
+declare -A CHECKPOINT_PAIR_WEIGHTS
+get_weight_change () {
+  local POSITION=$1
+  local NEXT_POSITION=$2
+  local DIRECTION=$3
+  # For same directions, weight change is 1
+  if [[ $(( NEXT_POSITION - POSITION )) -eq $DIR_UP ]] && [[ $(( DIRECTION % 2 )) -eq 0 ]]
+  then
+    printf "1"
+    return 0
+  elif [[ $(( NEXT_POSITION - POSITION )) -eq $DIR_DOWN ]] && [[ $(( DIRECTION % 3 )) -eq 0 ]]
+  then
+    printf "1"
+    return 0
+  elif [[ $(( NEXT_POSITION - POSITION )) -eq $DIR_LEFT ]] && [[ $(( DIRECTION % 5 )) -eq 0 ]]
+  then
+    printf "1"
+    return 0
+  elif [[ $(( NEXT_POSITION - POSITION )) -eq $DIR_RIGHT ]] && [[ $(( DIRECTION % 7 )) -eq 0 ]]
+  then
+    printf "1"
+    return 0
+  fi
+  # For different directions, weight change is 1000
+  printf "1000"
+}
+recurse_travel () {
+  local POSITION=$1
+  local CHECKPOINT=$2
+  local DIRECTION=$3
+  local WEIGHT=$4
+  local UP=$(( POSITION - MAP_WIDTH ))
+  local DOWN=$(( POSITION + MAP_WIDTH ))
+  local LEFT=$(( POSITION - 1 ))
+  local RIGHT=$(( POSITION + 1 ))
+  # Search adjacent tiles
+  # Recurse if it's movable
+  # Add a checkpoint pair and weights if checkpoint found
+  if [[ $(( DIRECTION % 2 )) -eq 0 ]] && [[ $UP -gt 0 ]]
+  then
+    if [[ ${MAP_ARRAY[$UP]} == "." ]]
+    then
+      WEIGHT_CHANGE=$( get_weight_change "$POSITION" "$UP" "$DIRECTION" )
+      recurse_travel "$UP" "$CHECKPOINT" "$(( 2 * 5 * 7 ))" "$(( WEIGHT + WEIGHT_CHANGE ))"
+    elif [[ -v CHECKPOINT_ARRAY[$UP] ]]
+    then
+      WEIGHT_CHANGE=$( get_weight_change "$POSITION" "$UP" "$DIRECTION" )
+      CHECKPOINT_PAIRS[$UP]=$CHECKPOINT
+      CHECKPOINT_PAIR_WEIGHTS["$UP-$CHECKPOINT"]=$(( WEIGHT + WEIGHT_CHANGE ))
+    fi
+  fi
+  if [[ $(( DIRECTION % 3 )) -eq 0 ]] && [[ $DOWN -lt $MAP_LEN ]]
+  then
+    if [[ ${MAP_ARRAY[$DOWN]} == "." ]]
+    then
+      WEIGHT_CHANGE=$( get_weight_change "$POSITION" "$DOWN" "$DIRECTION" )
+      recurse_travel "$DOWN" "$CHECKPOINT" "$(( 3 * 5 * 7 ))" "$(( WEIGHT + WEIGHT_CHANGE ))"
+    elif [[ -v CHECKPOINT_ARRAY[$DOWN] ]]
+    then
+      WEIGHT_CHANGE=$( get_weight_change "$POSITION" "$DOWN" "$DIRECTION" )
+      CHECKPOINT_PAIRS[$DOWN]=$CHECKPOINT
+      CHECKPOINT_PAIR_WEIGHTS["$DOWN-$CHECKPOINT"]=$(( WEIGHT + WEIGHT_CHANGE ))
+    fi
+  fi
+  if [[ $(( DIRECTION % 5 )) -eq 0 ]]
+  then
+    if [[ ${MAP_ARRAY[$LEFT]} == "." ]]
+    then
+      WEIGHT_CHANGE=$( get_weight_change "$POSITION" "$LEFT" "$DIRECTION" )
+      recurse_travel "$LEFT" "$CHECKPOINT" "$(( 2 * 3 * 5 ))" "$(( WEIGHT + WEIGHT_CHANGE ))"
+    elif [[ -v CHECKPOINT_ARRAY[$LEFT] ]]
+    then
+      WEIGHT_CHANGE=$( get_weight_change "$POSITION" "$LEFT" "$DIRECTION" )
+      CHECKPOINT_PAIRS[$LEFT]=$CHECKPOINT
+      CHECKPOINT_PAIR_WEIGHTS["$LEFT-$CHECKPOINT"]=$(( WEIGHT + WEIGHT_CHANGE ))
+    fi
+  fi
+  if [[ $(( DIRECTION % 7 )) -eq 0 ]]
+  then
+    if [[ ${MAP_ARRAY[$RIGHT]} == "." ]]
+    then
+      WEIGHT_CHANGE=$( get_weight_change "$POSITION" "$RIGHT" "$DIRECTION" )
+      recurse_travel "$RIGHT" "$CHECKPOINT" "$(( 2 * 3 * 7 ))" "$(( WEIGHT + WEIGHT_CHANGE ))"
+    elif [[ -v CHECKPOINT_ARRAY[$RIGHT] ]]
+    then
+      WEIGHT_CHANGE=$( get_weight_change "$POSITION" "$RIGHT" "$DIRECTION" )
+      CHECKPOINT_PAIRS[$RIGHT]=$CHECKPOINT
+      CHECKPOINT_PAIR_WEIGHTS["$RIGHT-$CHECKPOINT"]=$(( WEIGHT + WEIGHT_CHANGE ))
+    fi
+  fi
+}
+for CHECKPOINT in "${!CHECKPOINT_ARRAY[@]}"
+do
+  recurse_travel "$CHECKPOINT" "$CHECKPOINT" "$CHECKPOINT" "$(( 2 * 3 * 5 * 7 ))" "0"
+done
+for CHECKPOINT in "${!CHECKPOINT_PAIRS[@]}"
+do
+  printf "DEST %s from checkpoint %s\n" "${CHECKPOINT_PAIRS[$CHECKPOINT]}" "$CHECKPOINT"
+done
+for CHECKPOINT in "${!CHECKPOINT_PAIR_WEIGHTS[@]}"
+do
+  printf "Weight %s for checkpoint pair %s\n" "${CHECKPOINT_PAIR_WEIGHTS[$CHECKPOINT]}" "$CHECKPOINT"
+done
+
+# Score the path
+#
+
+print_map

2024/day-16/test-input-1

@@ -0,0 +1,15 @@
+###############
+#.......#....E#
+#.#.###.#.###.#
+#.....#.#...#.#
+#.###.#####.#.#
+#.#.#.......#.#
+#.#.#####.###.#
+#...........#.#
+###.#.#####.#.#
+#...#.....#.#.#
+#.#.#.###.#.#.#
+#.....#...#.#.#
+#.###.#.#.#.#.#
+#S..#.....#...#
+###############