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10 Commits
415f757054 ... main

Author SHA1 Message Date
Clement
0134815002 Working part 2 2024-12-20 01:01:41 +08:00
Clement
fd78069221 Day 19 Part 1 Working 2024-12-19 17:00:05 +08:00
Clement
ce0033c6f5 Clean up 2024-12-18 12:17:06 +08:00
Clement
0d518e1691 Working part 2. Added check_tail for digit matching. 2024-12-18 12:13:16 +08:00
Clement
de2fd03c3c Use read_opcode function 2024-12-17 17:09:19 +08:00
Clement
e02ee993c6 Offload machine to separate file 2024-12-17 16:30:14 +08:00
Clement
ac940aad0e Working day 17 part 1 2024-12-17 15:48:25 +08:00
Clement
f17b7f75d2 Day 16 Part 1 Non working 2024-12-16 19:14:02 +08:00
Clement
f6e91fa1fa Clean up 2024-12-15 22:45:25 +08:00
Clement
37667c0990 Working part 2 2024-12-15 20:47:09 +08:00
15 changed files with 1488 additions and 0 deletions
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250
2024/day-15/solution-2.sh Normal file
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#!/usr/bin/env bash
FUNCNEST=99999
MAP_FILE=input-map
DIRECTIONS_FILE=input-movements
MAP_WIDTH=$(( ( $( head -1 "$MAP_FILE" | wc -c ) -1 ) * 2 ))
# Move the robot
move_robot() {
MAP_ARRAY[ROBOT_POSITION]=.
ROBOT_POSITION=$NEXT_POSITION
MAP_ARRAY[ROBOT_POSITION]=@
}
# Function to move box in n direction
vertical_move_box () {
local BOX_COORDINATE=$1
local BOX_MOVE_DIRECTION=$2
# Normalise coordinates
if [[ ${MAP_ARRAY[$BOX_COORDINATE]} == "[" ]]
then
local L_SIDE=$BOX_COORDINATE
local R_SIDE=$(( BOX_COORDINATE +1 ))
elif [[ ${MAP_ARRAY[$BOX_COORDINATE]} == "]" ]]
then
local L_SIDE=$(( BOX_COORDINATE -1 ))
local R_SIDE=$BOX_COORDINATE
fi
local L_SIDE_MOVE_COORDINATE=$(( L_SIDE + BOX_MOVE_DIRECTION ))
local R_SIDE_MOVE_COORDINATE=$(( R_SIDE + BOX_MOVE_DIRECTION ))
# Recurse if there are more boxes
if [[ ${MAP_ARRAY[L_SIDE_MOVE_COORDINATE]} == "[" ]] || \
[[ ${MAP_ARRAY[L_SIDE_MOVE_COORDINATE]} == "]" ]]
then
vertical_move_box "$L_SIDE_MOVE_COORDINATE" "$BOX_MOVE_DIRECTION"
fi
if [[ ${MAP_ARRAY[R_SIDE_MOVE_COORDINATE]} == "[" ]] || \
[[ ${MAP_ARRAY[R_SIDE_MOVE_COORDINATE]} == "]" ]]
then
vertical_move_box "$R_SIDE_MOVE_COORDINATE" "$BOX_MOVE_DIRECTION"
fi
MAP_ARRAY[L_SIDE_MOVE_COORDINATE]="["
MAP_ARRAY[R_SIDE_MOVE_COORDINATE]="]"
MAP_ARRAY[L_SIDE]="."
MAP_ARRAY[R_SIDE]="."
}
# Function to check if box can be moved in n direction
vertical_check_move_box () {
local BOX_COORDINATE=$1
local BOX_MOVE_DIRECTION=$2
# Normalise coordinates
if [[ ${MAP_ARRAY[$BOX_COORDINATE]} == "[" ]]
then
local L_SIDE=$BOX_COORDINATE
local R_SIDE=$(( BOX_COORDINATE +1 ))
elif [[ ${MAP_ARRAY[$BOX_COORDINATE]} == "]" ]]
then
L_SIDE=$(( BOX_COORDINATE -1 ))
R_SIDE=$BOX_COORDINATE
fi
# Check if boxes are movable
local L_SIDE_MOVE_COORDINATE=$(( L_SIDE + BOX_MOVE_DIRECTION ))
local R_SIDE_MOVE_COORDINATE=$(( R_SIDE + BOX_MOVE_DIRECTION ))
if [[ ${MAP_ARRAY[$L_SIDE_MOVE_COORDINATE]} == '.' ]] && \
[[ ${MAP_ARRAY[$R_SIDE_MOVE_COORDINATE]} == '.' ]] # Can move
then
return 0
elif [[ ${MAP_ARRAY[$L_SIDE_MOVE_COORDINATE]} == '#' ]] || \
[[ ${MAP_ARRAY[$R_SIDE_MOVE_COORDINATE]} == '#' ]] # Blocked by wall
then
return 1
fi
# Recurse if there are more boxes
if [[ ${MAP_ARRAY[L_SIDE_MOVE_COORDINATE]} == "[" ]] || \
[[ ${MAP_ARRAY[L_SIDE_MOVE_COORDINATE]} == "]" ]]
then
vertical_check_move_box "$L_SIDE_MOVE_COORDINATE" "$BOX_MOVE_DIRECTION"
if [[ $? -eq 1 ]]
then
return 1
fi
fi
if [[ ${MAP_ARRAY[R_SIDE_MOVE_COORDINATE]} == "[" ]] || \
[[ ${MAP_ARRAY[R_SIDE_MOVE_COORDINATE]} == "]" ]]
then
vertical_check_move_box "$R_SIDE_MOVE_COORDINATE" "$BOX_MOVE_DIRECTION"
if [[ $? -eq 1 ]]
then
return 1
fi
fi
}
horizontal_move_box () {
local BOX_COOR=$1
local BOX_MOVE_DIRECTION=$2
local NEXT_SPOT=$(( BOX_COOR + BOX_MOVE_DIRECTION * 2 ))
if [[ ${MAP_ARRAY[$NEXT_SPOT]} == "#" ]]
then
return 1 # Failed to move box
elif [[ ${MAP_ARRAY[$NEXT_SPOT]} == "[" ]] || \
[[ ${MAP_ARRAY[$NEXT_SPOT]} == "]" ]]
then
horizontal_move_box "$NEXT_SPOT" "$BOX_MOVE_DIRECTION"
if [[ $? -eq 1 ]] ; then return 1 ; fi
elif [[ ${MAP_ARRAY[$NEXT_SPOT]} != "." ]]
then
return 1
fi
# Move the box
if [[ $NEXT_SPOT -lt $(( BOX_COOR + BOX_MOVE_DIRECTION )) ]]
then
MAP_ARRAY[NEXT_SPOT]="["
MAP_ARRAY[BOX_COOR + BOX_MOVE_DIRECTION]="]"
else
MAP_ARRAY[BOX_COOR + BOX_MOVE_DIRECTION]="["
MAP_ARRAY[NEXT_SPOT]="]"
fi
MAP_ARRAY[BOX_COOR]="."
}
# Load map
read -r -a MAP_ARRAY <<< "$(
< "$MAP_FILE" paste -s -d "" |
sed -E '
s/#/##/g;
s/\./../g;
s/@/@./g;
s/O/[]/g;
s/(.)(.)/\1 \2 /g'
)"
MAP_LEN=${#MAP_ARRAY[@]}
print_map () {
printf "%s " "${MAP_ARRAY[@]}" |
fold -w $(( MAP_WIDTH * 2 ))
printf "\n"
}
# Get robot position
for (( i=0; i<MAP_LEN; i++ ))
do
if [[ ${MAP_ARRAY[$i]} == "@" ]]
then
ROBOT_POSITION=$i
break
fi
done
printf "Robot position : %s\n" "$ROBOT_POSITION"
# Hardcode direction values
UP=$(( - MAP_WIDTH ))
DOWN=$MAP_WIDTH
LEFT=-1
RIGHT=1
# Iterate through directions
MOVES=0
print_map
while read -r DIRECTION
do
# Interpret directions
if [[ $DIRECTION == "^" ]]
then
DIRECTION_VALUE=$UP
elif [[ $DIRECTION == "v" ]]
then
DIRECTION_VALUE=$DOWN
elif [[ $DIRECTION == "<" ]]
then
DIRECTION_VALUE=$LEFT
elif [[ $DIRECTION == ">" ]]
then
DIRECTION_VALUE=$RIGHT
fi
NEXT_POSITION=$(( ROBOT_POSITION + DIRECTION_VALUE ))
# Box in front
if [[ ${MAP_ARRAY[$NEXT_POSITION]} == "[" ]] || \
[[ ${MAP_ARRAY[$NEXT_POSITION]} == "]" ]]
then
#printf "Hit box.\n"
if [[ $DIRECTION_VALUE -eq $LEFT ]] || \
[[ $DIRECTION_VALUE -eq $RIGHT ]]
then
#printf "Left right box movement.\n"
if horizontal_move_box "$NEXT_POSITION" "$DIRECTION_VALUE"
then
move_robot
fi
elif [[ $DIRECTION_VALUE -eq $UP ]] || \
[[ $DIRECTION_VALUE -eq $DOWN ]]
then
#printf "Up down box movement.\n"
if vertical_check_move_box "$NEXT_POSITION" "$DIRECTION_VALUE"
then
vertical_move_box "$NEXT_POSITION" "$DIRECTION_VALUE"
move_robot
fi
fi
# Wall in front, do nothing
elif [[ ${MAP_ARRAY[$NEXT_POSITION]} == "#" ]]
then
#printf "Next: %s Skipping\n" "${MAP_ARRAY[$NEXT_POSITION]}"
:
# Empty space, move forward
elif [[ ${MAP_ARRAY[$NEXT_POSITION]} == "." ]]
then
#printf "Next: %s Move robot forward\n" "${MAP_ARRAY[$NEXT_POSITION]}"
move_robot
fi
(( MOVES++ ))
#print_map
done <<< "$( < "$DIRECTIONS_FILE" paste -s -d "" | sed -E 's/(.)(.)/\1 \2 /g' | tr ' ' '\n' )"
printf "Moves: %s\n" "$MOVES"
print_map
# Calculate GPS values for boxes
SUM=0
BOX_COUNT=0
for (( i=0; i<MAP_LEN; i++ ))
do
if [[ ${MAP_ARRAY[i]} == "[" ]]
then
(( BOX_COUNT++ ))
X=$(( i % MAP_WIDTH ))
Y=$(( i / MAP_WIDTH * 100 ))
GPS=$(( X + Y ))
#printf "Box %s X: %s Y: %s GPS: %s\n" "$i" "$X" "$Y" "$GPS"
(( SUM+=GPS ))
fi
done
printf "Sum: %s\n" "$SUM"
printf "Box count: %s\n" "$BOX_COUNT"

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#S#...............................................#.................#.......#...........#.........#...........#.......#...............#.....#
#############################################################################################################################################

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#!/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"
CHECKPOINT_ARRAY_LEN=${#CHECKPOINT_ARRAY[@]}
# Iterate over checkpoints and print pairings
declare -A CHECKPOINT_PAIRS
declare -A CHECKPOINT_PAIR_WEIGHTS
PREV_UP=$(( 2 * 5 * 7 ))
PREV_DOWN=$(( 3 * 5 * 7 ))
PREV_LEFT=$(( 2 * 3 * 5 ))
PREV_RIGHT=$(( 2 * 3 * 7 ))
get_weight_change () {
local POSITION=$1
local NEXT_POSITION=$2
local DIRECTION=$3
# Check if next position is moving in line with the previous direction
if [[ $(( NEXT_POSITION - POSITION )) -eq $DIR_UP ]] && [[ $(( DIRECTION % PREV_UP )) -eq 0 ]]
then
printf "1"
return 0
elif [[ $(( NEXT_POSITION - POSITION )) -eq $DIR_DOWN ]] && [[ $(( DIRECTION % PREV_DOWN )) -eq 0 ]]
then
printf "1"
return 0
elif [[ $(( NEXT_POSITION - POSITION )) -eq $DIR_LEFT ]] && [[ $(( DIRECTION % PREV_LEFT )) -eq 0 ]]
then
printf "1"
return 0
elif [[ $(( NEXT_POSITION - POSITION )) -eq $DIR_RIGHT ]] && [[ $(( DIRECTION % PREV_RIGHT )) -eq 0 ]]
then
printf "1"
return 0
fi
# For different directions, weight change is 1000
printf "1000"
}
recurse_travel () {
local POSITION=$1 # Current position
local CHECKPOINT=$2 # Previous checkpoint
local DIRECTION=$3 # Allowed adjacent tiles
local WEIGHT=$4 # Weightage so far
# Search adjacent tiles
# Recurse if it's movable
# Add a checkpoint pair and weights if checkpoint found
# 2 : Up
# 3 : Down
# 5 : Left
# 7 : Right
if [[ $(( DIRECTION % 2 )) -eq 0 ]]
then
local UP=$(( POSITION + DIR_UP ))
if [[ $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" "$DIRECTION" )
CHECKPOINT_PAIRS["$CHECKPOINT-$UP"]=0
CHECKPOINT_PAIR_WEIGHTS["$CHECKPOINT-$UP"]=$(( WEIGHT + WEIGHT_CHANGE ))
fi
fi
fi
if [[ $(( DIRECTION % 3 )) -eq 0 ]] && [[ $DOWN -lt $MAP_LEN ]]
then
local DOWN=$(( POSITION + DIR_DOWN ))
if [[ $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" "$DIRECTION" )
CHECKPOINT_PAIRS["$CHECKPOINT-$DOWN"]=0
CHECKPOINT_PAIR_WEIGHTS["$CHECKPOINT-$DOWN"]=$(( WEIGHT + WEIGHT_CHANGE ))
fi
fi
fi
if [[ $(( DIRECTION % 5 )) -eq 0 ]]
then
local LEFT=$(( POSITION + DIR_LEFT ))
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" "$DIRECTION" )
CHECKPOINT_PAIRS["$CHECKPOINT-$LEFT"]=0
CHECKPOINT_PAIR_WEIGHTS["$CHECKPOINT-$LEFT"]=$(( WEIGHT + WEIGHT_CHANGE ))
fi
fi
if [[ $(( DIRECTION % 7 )) -eq 0 ]]
then
local RIGHT=$(( POSITION + DIR_RIGHT ))
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" "$DIRECTION" )
CHECKPOINT_PAIRS["$CHECKPOINT-$RIGHT"]=0
CHECKPOINT_PAIR_WEIGHTS["$CHECKPOINT-$RIGHT"]=$(( WEIGHT + WEIGHT_CHANGE ))
fi
fi
}
ITER=99999
for CHECKPOINT in "${!CHECKPOINT_ARRAY[@]}"
do
recurse_travel "$CHECKPOINT" "$CHECKPOINT" "$(( 2 * 3 * 5 * 7 ))" "0"
(( ITER-- ))
if [[ $ITER -eq 0 ]] ; then break ;fi
done
for CHECKPOINT in "${!CHECKPOINT_PAIRS[@]}"
do
printf "Dest %s from checkpoint %s\n" "${CHECKPOINT_PAIRS[$CHECKPOINT]}" "$CHECKPOINT"
done | sort
for CHECKPOINT in "${!CHECKPOINT_PAIR_WEIGHTS[@]}"
do
printf "Weight %s for checkpoint pair %s\n" "${CHECKPOINT_PAIR_WEIGHTS[$CHECKPOINT]}" "$CHECKPOINT"
done | sort
if [[ ${#CHECKPOINT_PAIRS[@]} -ne ${#CHECKPOINT_PAIR_WEIGHTS[@]} ]]
then
printf "Checkpoint count with weight counts do not match.\n"
fi
# Map out full paths for calculate final results for it
# Quite akin to BFS
declare -A FINAL_PATH
FINAL_PATH[$START_POSITION]=0
for (( i=0 ; i<CHECKPOINT_ARRAY_LEN ; i+= 1 )) # Start to end should only have these many iterations
do
for PATH in "${!FINAL_PATH[@]}"
do
CHECKPOINT=${PATH##*-}
PATH_SCORE=${FINAL_PATH[$PATH]}
if [[ $CHECKPOINT -eq $END_POSITION ]] # This path has completed
then
continue
fi
for NEXT_CHECKPOINT in "${!CHECKPOINT_ARRAY[@]}" # Check if there is a next mapping
do
if [[ $PATH =~ -$NEXT_CHECKPOINT- ]]; then continue; fi # Prevent loops
PAIR="$CHECKPOINT-$NEXT_CHECKPOINT"
if [[ -v CHECKPOINT_PAIRS[$PAIR] ]]
then
FINAL_PATH["$PATH-$NEXT_CHECKPOINT"]=$(( PATH_SCORE + ${CHECKPOINT_PAIR_WEIGHTS[$PAIR]} ))
unset "FINAL_PATH[$PATH]"
fi
done
done
done
for PATH in "${!FINAL_PATH[@]}"
do
END=${PATH##*-}
if [[ $END == "$END_POSITION" ]]
then
printf "Path: %s weight: %s \n" "$PATH" "${FINAL_PATH[$PATH]}"
fi
done
#print_map

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###############
#.......#....E#
#.#.###.#.###.#
#.....#.#...#.#
#.###.#####.#.#
#.#.#.......#.#
#.#.#####.###.#
#...........#.#
###.#.#####.#.#
#...#.....#.#.#
#.#.#.###.#.#.#
#.....#...#.#.#
#.###.#.#.#.#.#
#S..#.....#...#
###############

5
2024/day-17/input Normal file
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Register A: 64196994
Register B: 0
Register C: 0
Program: 2,4,1,1,7,5,1,5,4,0,0,3,5,5,3,0

160
2024/day-17/machine.sh Normal file
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#!/usr/bin/env bash
adv () { # OPCODE 0
$DEBUG && printf "OPCODE : 0 OP: adv OPERAND: %s\n" "$1" >&2
OPERAND=$( get_combo "$1" )
#REG_A=$(( REG_A / (2 ** OPERAND) ))
REG_A=$( printf "%s / (2 ^ %s) \n" "$REG_A" "$OPERAND" | bc )
}
bxl () { # OPCODE 1
$DEBUG && printf "OPCODE : 1 OP: bxl OPERAND: %s\n" "$1" >&2
OPERAND=$1
REG_B=$(( REG_B ^ OPERAND ))
}
bst () { # OPCODE 2
$DEBUG && printf "OPCODE : 2 OP: bst OPERAND: %s\n" "$1" >&2
OPERAND=$( get_combo "$1" )
REG_B=$(( OPERAND % 8 ))
}
jnz () { # OPCODE 3
$DEBUG && printf "OPCODE : 3 OP: jnz OPERAND: %s\n" "$1" >&2
OPERAND=$1
if [[ $REG_A -eq 0 ]]
then
return 0
else
POINTER=$OPERAND
fi
}
bxc () { # OPCODE 4
$DEBUG && printf "OPCODE : 4 OP: bxc OPERAND: %s\n" "$1" >&2
# OPERAND=$1 # Deprecated for legacy reasons
REG_B=$(( REG_B ^ REG_C ))
}
out () { # OPCODE 5
$DEBUG && printf "OPCODE : 5 OP: out OPERAND: %s\n" "$1" >&2
OPERAND=$( get_combo "$1" )
printf "%s\n" "$(( OPERAND % 8 ))"
}
bdv () { # OPCODE 6
$DEBUG && printf "OPCODE : 6 OP: bdv OPERAND: %s\n" "$1" >&2
OPERAND=$( get_combo "$1" )
#REG_B=$(( REG_A / (2 ** OPERAND) ))
REG_B=$( printf "%s / (2 ^ %s) \n" "$REG_A" "$OPERAND" | bc )
}
cdv () { # OPCODE 7
$DEBUG && printf "OPCODE : 7 OP: cdv OPERAND: %s\n" "$1" >&2
OPERAND=$( get_combo "$1" )
#REG_C=$(( REG_A / (2 ** OPERAND) ))
REG_C=$( printf "%s / (2 ^ %s) \n" "$REG_A" "$OPERAND" | bc )
}
# Get combo operand
get_combo () {
if [[ $OPERAND -eq 0 ]]
then
printf "$1"
elif [[ $OPERAND -eq 1 ]]
then
printf "$1"
elif [[ $OPERAND -eq 2 ]]
then
printf "$1"
elif [[ $OPERAND -eq 3 ]]
then
printf "$1"
elif [[ $OPERAND -eq 4 ]]
then
printf "%s" "$REG_A"
elif [[ $OPERAND -eq 5 ]]
then
printf "%s" "$REG_B"
elif [[ $OPERAND -eq 6 ]]
then
printf "%s" "$REG_C"
elif [[ $OPERAND -eq 7 ]]
then
printf "Reserved operand. Exiting.\n" >&2
exit 1
fi
}
# Check if the program is a quine
check_quine () {
$DEBUG && printf "%s," "${INPUT[@]}"
$DEBUG && printf "%s," "${OUTPUT[@]}"
for (( i=0; i<${#INPUT[@]}; i++ ))
do
if [[ ${INPUT[$i]} != "${OUTPUT[$i]}" ]]
then
return 1
fi
done
}
# Check digits
check_tail () {
$DEBUG && printf "%s," "${INPUT[@]}"
$DEBUG && printf "%s," "${OUTPUT[@]}"
for (( i=${#INPUT[@]}; i>=${#INPUT[@]}-$1; i-- ))
do
if [[ ${INPUT[$i]} != "${OUTPUT[$i]}" ]]
then
return 1
fi
done
}
# Interpret opcode
read_opcode () {
local OPCODE=$1
local OPERAND=$2
if [[ $OPCODE -eq 0 ]]
then
adv "$OPERAND"
(( POINTER+=2 ))
elif [[ $OPCODE -eq 1 ]]
then
bxl "$OPERAND"
(( POINTER+=2 ))
elif [[ $OPCODE -eq 2 ]]
then
bst "$OPERAND"
(( POINTER+=2 ))
elif [[ $OPCODE -eq 3 ]]
then
# jnz itself moves the pointer
jnz "$OPERAND"
elif [[ $OPCODE -eq 4 ]]
then
bxc "$OPERAND"
(( POINTER+=2 ))
elif [[ $OPCODE -eq 5 ]]
then
out "$OPERAND"
(( POINTER+=2 ))
elif [[ $OPCODE -eq 6 ]]
then
bdv "$OPERAND"
(( POINTER+=2 ))
elif [[ $OPCODE -eq 7 ]]
then
cdv "$OPERAND"
(( POINTER+=2 ))
fi
}
execute_machine () {
POINTER=0
while [[ $POINTER -lt $INPUT_LEN ]]
do
OPCODE=${INPUT[$POINTER]}
OPERAND=${INPUT[$POINTER+1]}
read_opcode "$OPCODE" "$OPERAND"
$DEBUG && printf "Registers A : %s B: %s C : %s\n" "$REG_A" "$REG_B" "$REG_C" >&2
$DEBUG && printf "Pointer : %s\n" "$POINTER" >&2
(( MACHINE_ITER-- ))
if [[ $MACHINE_ITER -eq 0 ]] ; then break ; fi
done | paste -s -d " "
}

31
2024/day-17/solution-1.sh Normal file
View File

@ -0,0 +1,31 @@
#!/usr/bin/env bash
FILE=$1
ITER=99
DEBUG=false
REG_A=$(grep 'Register A:' "$FILE" | cut -f2 -d: )
REG_B=$(grep 'Register B:' "$FILE" | cut -f2 -d: )
REG_C=$(grep 'Register C:' "$FILE" | cut -f2 -d: )
read -r -a INPUT <<< "$(grep 'Program:' "$FILE" | cut -f2 -d: | tr ',' ' ' )"
INPUT_LEN=${#INPUT[@]}
printf "Registers A: %s B: %s C: %s\n" "$REG_A" "$REG_B" "$REG_C" >&2
printf "Input : " >&2
printf "%s " "${INPUT[@]}" >&2
printf "\n" >&2
# Load machine operations
. machine.sh
POINTER=0
while [[ $POINTER -lt $INPUT_LEN ]]
do
OPCODE=${INPUT[$POINTER]}
OPERAND=${INPUT[$POINTER+1]}
read_opcode "$OPCODE" "$OPERAND"
printf "Registers A : %s B: %s C : %s\n" "$REG_A" "$REG_B" "$REG_C" >&2
printf "Pointer : %s\n" "$POINTER" >&2
(( ITER-- ))
if [[ $ITER -eq 0 ]] ; then break ;fi
done | paste -s -d ","

52
2024/day-17/solution-2.sh Normal file
View File

@ -0,0 +1,52 @@
#!/usr/bin/env bash
FILE=$1
ITER=1
MACHINE_ITER=999
DEBUG=false
INCREMENT=100000000000
TAIL_NUM=3
# Load registry values
REG_A=$(grep 'Register A:' "$FILE" | cut -f2 -d: )
REG_B=$(grep 'Register B:' "$FILE" | cut -f2 -d: )
REG_C=$(grep 'Register C:' "$FILE" | cut -f2 -d: )
# Rewrite registry A starting value
REG_A=100000000000000
#REG_A=164541160582800
# Load input string
read -r -a INPUT <<< "$(grep 'Program:' "$FILE" | cut -f2 -d: | tr ',' ' ' )"
INPUT_LEN=${#INPUT[@]}
printf "Registers A: %s B: %s C: %s\n" "$REG_A" "$REG_B" "$REG_C" >&2
#printf "Input: " >&2
#printf "%s " "${INPUT[@]}" >&2
#printf "\n" >&2
# Load machine operations
. machine.sh
# Iterate registry A until last nth digits are matched
PIN_DIGITS=0
while ! check_tail "$INPUT_LEN" "$PIN_DIGITS"
do
while ! check_tail "$TAIL_NUM" "$PIN_DIGITS"
do
read -r -a OUTPUT <<< "$( execute_machine )"
printf "Register A: %s\n" "$REG_A"
printf "Output:\t"
printf "%s " "${OUTPUT[@]}"
printf "\n"
printf "Input:\t"
printf "%s " "${INPUT[@]}"
printf "\n"
(( REG_A+=INCREMENT))
#(( ITER-- ))
if [[ $ITER -eq 0 ]] ; then break ; fi
done
PIN_DIGITS=$TAIL_NUM
printf "Matched digit. Reducing count"
(( TAIL_NUM+=1 ))
(( INCREMENT/= 50 ))
done

5
2024/day-17/test-input-1 Normal file
View File

@ -0,0 +1,5 @@
Register A: 729
Register B: 0
Register C: 0
Program: 0,1,5,4,3,0

400
2024/day-19/input-designs Normal file
View File

@ -0,0 +1,400 @@
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1
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90
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#!/usr/bin/env bash
TOWEL_FILE=$1
DESIGN_FILE=$2
TOWEL_ITER=10
read -r -a TOWELS <<< "$( < "$TOWEL_FILE" tr ',' ' ' | paste -s -d " " )"
read -r -a DESIGNS <<< "$( < "$DESIGN_FILE" paste -s -d " " )"
#printf "Towel %s\n" "${TOWELS[@]}"
#printf "Design %s\n" "${DESIGNS[@]}"
# Check if towel is a viable match
match_towel () {
TOWEL=$1
MATCH=$2
FULL_DESIGN=$3
TO_MATCH="$MATCH$TOWEL"
PARTIAL_DESIGN=${FULL_DESIGN::${#TO_MATCH}}
if [[ $PARTIAL_DESIGN == "$TO_MATCH" ]]
then
return 0
else
return 1
fi
}
TOTAL_VALID=0
declare -A UNMATCHED_TOWEL_LIST
for DESIGN in "${DESIGNS[@]}"
do
printf "Starting design : %s\n" "$DESIGN"
declare -A MATCH_LIST
# Get all viable starting matches
for TOWEL_IDX in "${!TOWELS[@]}"
do
TOWEL=${TOWELS[$TOWEL_IDX]}
#printf "Testing towel: %s\n" "$TOWEL"
if match_towel "$TOWEL" "" "$DESIGN"
then
#printf "Starting match found. towel : %s\n" "$TOWEL"
# Copy towel list and remove the starting towel
read -r -a TOWEL_LIST <<< "$( printf "%s " "${TOWELS[@]}" )"
unset "TOWEL_LIST[$TOWEL_IDX]"
# Add to combinations
MATCH_LIST["$TOWEL"]=$( printf "%s " "${TOWEL_LIST[@]}" )
unset "TOWEL_LIST"
fi
done
if [[ ${#MATCH_LIST[@]} -eq 0 ]] ; then printf "No available starting matches.\n" ; continue ; fi
# Now iterate over starting matches
LOOP_COUNT=${#TOWELS[@]}
while [[ $LOOP_COUNT -gt 0 ]]
do
for TOWEL_MATCH in "${!MATCH_LIST[@]}"
do
read -r -a TOWEL_LIST <<< "${MATCH_LIST[$TOWEL_MATCH]}"
# Iterate over towels and find subsequent match
for TOWEL_IDX in "${!TOWEL_LIST[@]}"
do
TOWEL=${TOWELS[$TOWEL_IDX]}
if match_towel "$TOWEL" "$TOWEL_MATCH" "$DESIGN"
then
#printf "Match found for %s towel : %s\n" "${TOWEL_MATCH}" "$TOWEL"
unset "TOWEL_LIST[$TOWEL_IDX]"
# Add to combinations
MATCH_LIST["$TOWEL_MATCH$TOWEL"]=$( printf "%s " "${TOWEL_LIST[@]}" )
unset "MATCH_LIST[$TOWEL_MATCH]"
fi
done
done
(( LOOP_COUNT-- ))
done
# Calculate proper matches
for MATCH in "${!MATCH_LIST[@]}"
do
if [[ $MATCH == "$DESIGN" ]]
then
printf "Match found for design %s\n" "$DESIGN"
(( TOTAL_VALID++ ))
fi
done
# Remove matches
unset MATCH_LIST
done
printf "Total valid designs: %s\n" "$TOTAL_VALID"

76
2024/day-19/solution-2.sh Normal file
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#!/usr/bin/env bash
TOWEL_FILE=$1
DESIGN_FILE=$2
read -r -a TOWELS <<< "$( < "$TOWEL_FILE" tr ',' ' ' | paste -s -d " " )"
read -r -a DESIGNS <<< "$( < "$DESIGN_FILE" paste -s -d " " )"
# Check if towel is a viable match
match_towel () {
TOWEL=$1
MATCH=$2
FULL_DESIGN=$3
TO_MATCH="$MATCH$TOWEL"
PARTIAL_DESIGN=${FULL_DESIGN::${#TO_MATCH}}
if [[ $PARTIAL_DESIGN == "$TO_MATCH" ]]
then
return 0
else
return 1
fi
}
TOTAL_VALID=0
# Loop through designs
for DESIGN in "${DESIGNS[@]}"
do
# The idea is for each design, keep a sum of combinations
# for each index position of the DESIGN string
# Since the branches "multiply", just take the sum
# at the starting index, and add it to the end
# of the "combined" index
# for each possible combination.
printf "Starting design : %s\n" "$DESIGN"
declare -A POINTER_LIST
POINTER_LIST[0]=1
POINTER_END=$(( ${#DESIGN} ))
while true
do
POINTER=${#DESIGN}
# Pick lowest pointer value
for P in "${!POINTER_LIST[@]}"
do
if [[ $P -lt $POINTER ]]
then
POINTER=$P
fi
done
POINTER_VALUE=${POINTER_LIST[$POINTER]}
# Check if end has reached
if [[ $POINTER -eq $POINTER_END ]]
then
break
fi
# Loop through towels and remove earliest pointer
for TOWEL in "${TOWELS[@]}"
do
TOWEL_LEN=${#TOWEL}
END=$(( POINTER + TOWEL_LEN ))
if [[ ${DESIGN:$POINTER:$TOWEL_LEN} == "$TOWEL" ]]
then
POINTER_LIST[$END]=$(( ${POINTER_LIST[$END]} + POINTER_VALUE ))
fi
done
# Done looping through for specific point
unset "POINTER_LIST[$POINTER]"
done
printf "Total matches for %s is %s.\n" "$DESIGN" "${POINTER_LIST[$POINTER_END]}"
TOTAL_VALID=$(( TOTAL_VALID + POINTER_LIST[$POINTER_END] ))
unset "POINTER_LIST"
done
printf "Total valid designs: %s\n" "$TOTAL_VALID"

8
2024/day-19/test-designs Normal file
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brwrr
bggr
gbbr
rrbgbr
ubwu
bwurrg
brgr
bbrgwb

1
2024/day-19/test-towels Normal file
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r, wr, b, g, bwu, rb, gb, br