day 11, 12 + folder refactoring

10_day/code.py

@@ -1,11 +1,6 @@
 import fileinput
 
-scores = [
-	3,
-	57,
-	1197,
-	25137
-]
+scores = [3, 57, 1197, 25137]
 
 opening_chars = ['(', '[', '{', '<']
 closing_chars = [')', ']', '}', '>']
@@ -23,10 +18,10 @@ for line in lines:
 	complete = True
 	for column, c in enumerate(line):
 		if c in opening_chars:
-			stack.append(c)
+			stack.append(opening_chars.index(c))
 		if c in closing_chars:
 			i = closing_chars.index(c)
-			if stack[-1] != opening_chars[i]:
+			if stack[-1] != i:
 				expected_i = opening_chars.index(stack[-1])
 				# print(line)
 

11_day/code.py

@@ -0,0 +1,67 @@
+import pprint
+import fileinput
+
+rows = []
+for line in fileinput.input():
+	l = line.strip()
+	if l == '':
+		continue
+	rows.append(list(map(int, list(l))))
+
+pprint.pprint(rows)
+
+def print_table(rows):
+	for r in rows:
+		print(''.join(map(str, r)))
+
+def is_all_zeros(rows):
+	return list(map(lambda r: ''.join(map(str, r)), rows)) == 10*[10*'0']
+
+print_table(rows)	
+
+flashes = 0
+for step in range(10000):
+	print(f'step #{step}')
+	locked = []
+	pops = 1
+	while pops > 0:
+		pops = 0
+		for i in range(10):
+			for j in range(10):
+				if rows[i][j] >= 9:
+					pops += 1
+					flashes += 1
+					diagonals = [
+						(i-1, j-1),
+						(i-1, j),
+						(i-1, j+1),
+						(i, j-1),
+						(i, j+1),
+						(i+1, j-1),
+						(i+1, j),
+						(i+1, j+1)
+					]
+					rows[i][j] = 0
+					locked.append((i, j))
+					for y,x in diagonals:
+						if not (0 <= y < 10 and 0 <= x < 10): continue
+						if (y, x) in locked: continue
+						rows[y][x] += 1
+
+	for i in range(10):
+		for j in range(10):
+			if (i, j) in locked: continue
+			rows[i][j] += 1
+
+	if is_all_zeros(rows): 
+		print(rows)
+		print_table(rows)
+		print(step+1)
+		break
+
+	print_table(rows)
+
+pprint.pprint(rows)
+print(flashes)
+
+

11_day/example.txt

@@ -0,0 +1,5 @@
+11111
+19991
+19191
+19991
+11111

11_day/example2.txt

@@ -0,0 +1,10 @@
+5483143223
+2745854711
+5264556173
+6141336146
+6357385478
+4167524645
+2176841721
+6882881134
+4846848554
+5283751526

11_day/input.txt

@@ -0,0 +1,11 @@
+4781623888
+1784156114
+3265645122
+4371551414
+3377154886
+7882314455
+6421348681
+7175424287
+5488242184
+2448568261
+

12_day/code.py

@@ -0,0 +1,74 @@
+import pprint
+import itertools
+import fileinput
+
+nodes = []
+edges = []
+for raw in fileinput.input():
+	line = raw.strip()
+	if line == '': continue
+	[a,b] = line.split('-')
+	nodes += [a, b]
+	edges.append((a, b))
+
+nodes = list(set(nodes))
+nodes.sort()
+
+graph = [[0 for j in range(len(nodes))] for i in range(len(nodes))]
+
+#pprint.pprint(graph)
+
+for (a,b) in edges:
+	i, j = nodes.index(a), nodes.index(b)
+	graph[i][j] = 1
+	graph[j][i] = 1
+
+visit_only_once = [e for e in nodes if e.lower() == e and e != 'start' and e != 'end']
+
+start_index = nodes.index('start')
+end_index = nodes.index('end')
+
+nodes_d = [(i,e) for i,e in enumerate(nodes)]
+
+print(f'{nodes_d=}')
+print(f'{visit_only_once=}')
+
+visit_only_once_index = [nodes.index(e) for e in visit_only_once]+[start_index, end_index]
+
+def explore_path(stack, level, locked, s, did_visit_twice):
+	edges = [i for i,e in enumerate(graph[s]) if e]
+	
+	if s == end_index:
+		return [s] + [stack]
+
+	paths = []
+	for edge in edges:
+		if edge == start_index: continue
+
+		if edge in visit_only_once_index:
+			if edge in locked:
+				if not did_visit_twice and edge != start_index and edge != end_index:
+					did_visit_twice = True
+				else:
+					continue
+			locked.add(edge)
+
+		#print(f'{level=} , {nodes[edge]=}, {new_locked=}, {at_most=} ')
+		paths += explore_path([s]+stack, level+1, locked.copy(), edge, did_visit_twice)
+	return paths
+
+print('start exploring...')
+
+paths = explore_path([], 0, set(), start_index, False)
+
+all_paths = [ ''.join(map(str, p)) for p in paths ]
+
+res = list(set(all_paths))
+
+for p in res:
+	new_p = list(map(int, list(p)))
+	#print([ nodes[i] for i in list(reversed(new_p))])
+
+#print(res)
+
+print(f'There are {len(res)} paths')	

12_day/code_part_1.py

@@ -0,0 +1,61 @@
+import pprint
+import itertools
+import fileinput
+
+nodes = []
+edges = []
+for raw in fileinput.input():
+	line = raw.strip()
+	if line == '': continue
+	[a,b] = line.split('-')
+	nodes += [a, b]
+	edges.append((a, b))
+
+nodes = list(set(nodes))
+nodes.sort()
+
+graph = [[0 for j in range(len(nodes))] for i in range(len(nodes))]
+
+#pprint.pprint(graph)
+
+for (a,b) in edges:
+	i, j = nodes.index(a), nodes.index(b)
+	graph[i][j] = 1
+	graph[j][i] = 1
+
+visit_only_once = [e for e in nodes if e.lower() == e and e != 'start' and e != 'end']
+
+start_index = nodes.index('start')
+end_index = nodes.index('end')
+
+print(f'{visit_only_once=}')
+
+visit_only_once_index = [nodes.index(e) for e in visit_only_once]
+
+possibles = []
+
+def explore_path(stack, level, locked, s):
+	edges = [i for i,e in enumerate(graph[s]) if e]
+	
+	if s == end_index:
+		possibles.append(stack)
+		return
+
+	for edge in edges:
+		new_locked = locked.copy()
+		if edge in locked: continue
+		if edge == start_index: continue
+		if edge in visit_only_once_index:
+			new_locked += [edge]
+
+		#print(f'{level=} , {nodes[edge]=}, {new_locked=}')
+		explore_path([s]+stack, level+1, new_locked, edge)
+
+print('start exploring...')
+
+explore_path([], 0, [], start_index)
+
+for p in possibles:
+	print([ nodes[i] for i in list(reversed(p))])
+
+print(f'There are {len(possibles)} paths')

12_day/example1.txt

@@ -0,0 +1,7 @@
+start-A
+start-b
+A-c
+A-b
+b-d
+A-end
+b-end

12_day/example2.txt

@@ -0,0 +1,10 @@
+dc-end
+HN-start
+start-kj
+dc-start
+dc-HN
+LN-dc
+HN-end
+kj-sa
+kj-HN
+kj-dc

12_day/example3.txt

@@ -0,0 +1,18 @@
+fs-end
+he-DX
+fs-he
+start-DX
+pj-DX
+end-zg
+zg-sl
+zg-pj
+pj-he
+RW-he
+fs-DX
+pj-RW
+zg-RW
+start-pj
+he-WI
+zg-he
+pj-fs
+start-RW

12_day/input.txt

@@ -0,0 +1,24 @@
+yb-pi
+jg-ej
+yb-KN
+LD-start
+end-UF
+UF-yb
+yb-xd
+qx-yb
+xd-end
+jg-KN
+start-qx
+start-ej
+qx-LD
+jg-LD
+xd-LD
+ej-qx
+end-KN
+DM-xd
+jg-yb
+ej-LD
+qx-UF
+UF-jg
+qx-jg
+xd-UF

12_day/wow1.py

@@ -0,0 +1,80 @@
+import fileinput
+
+def read_file():
+	return [line.strip() for line in fileinput.input()]
+
+def make_graph(lines):
+	graph = {}
+	small_caves = set()
+	for line in lines:
+		a, b = line.split('-')
+		add_path(graph, a, b)
+		add_path(graph, b, a)
+		if a.islower():
+			small_caves.add(a)
+		if b.islower():
+			small_caves.add(b)
+	return graph, small_caves
+
+
+def add_path(graph, a, b):
+	nodes = graph.get(a)
+	if nodes == None:
+		graph[a] = [b]
+	else:
+		nodes.append(b)
+
+
+def find_paths(graph,
+	             small_caves,
+	             can_visit_twice,
+	             current,
+	             end,
+	             path,
+	             small_visited,
+	             did_visit_twice=False):
+	
+	if current in small_caves:
+		if current in small_visited:
+			if can_visit_twice and not did_visit_twice and current != 'start' and current != 'end':
+				did_visit_twice = True
+			else:
+				return None
+		small_visited.add(current)
+
+	path.append(current)
+
+	if current == end:
+		return [path]
+
+	paths = []
+	connected = graph[current]
+	for cave in connected:
+		subpaths = find_paths(graph, small_caves, can_visit_twice, cave, end,
+		                      path.copy(), small_visited.copy(), did_visit_twice)
+		if subpaths != None:
+			paths.extend(subpaths)
+
+	return paths
+
+
+def print_graph(graph):
+	for key, value in graph.items():
+		for cave in value:
+			print(f"{key} -> {cave}")
+
+
+def print_paths(paths):
+	for path in paths:
+		print(','.join(path))
+
+
+input = read_file()
+graph, small_caves = make_graph(input)
+
+paths = find_paths(graph, small_caves, False, 'start', 'end', [], set())
+print(f"Part 1: {len(paths)}")
+
+paths = find_paths(graph, small_caves, True, 'start', 'end', [], set())
+print(f"Part 2: {len(paths)}")
+

13_day/code.py

@@ -0,0 +1,109 @@
+import fileinput
+
+def make_matrix(rows, columns, default = False):
+	return [
+		[default for c in range(columns)] for r in range(rows)
+	]
+
+def parse_input(lines):
+	X = []
+	Y = []
+	folds = []
+	for l in lines:
+		l = l.strip()
+		if l == '':
+			continue
+		if 'fold along' in l:
+			folds.append(
+				('x' if 'x' in l else 'y', int(l.split('=')[1]))
+			)
+		else:
+			c = list(map(int, l.split(',')))
+			X.append(c[0])
+			Y.append(c[1])
+
+	maxX, maxY = max(X), max(Y)
+
+	rows = make_matrix(maxY+1, maxX+1)
+	for x,y in zip(X, Y):
+		rows[y][x] = True
+
+	return X, Y, folds, rows
+
+def draw_board(rows):
+	for r in rows:
+		line = ''
+		for c in r:
+			if not c:
+				line += '.'
+			else:
+				line += 'X'
+		print(line)
+
+def merge_in(a, b):
+	new = []
+	for i in range(len(a)):
+		if a[i] or b[i]:
+			new.append(True)
+		else:
+			new.append(False)
+	return new
+
+def get_column(rows, index):
+	out = []
+	for r in rows:
+		out.append(r[index])
+	return out
+
+def set_column(rows, j, col):
+	out = rows.copy()
+	for i,c in enumerate(col):
+		out[i][j] = c
+	return out
+
+
+def fold_along(rows, along, c):
+	print(f'fold {along=} {c=}')
+	new_rows = []
+	h = len(rows)
+	w = len(rows[0])
+	if along == 'y':
+		new_rows = make_matrix(c, w)
+		for i in range(0, c):
+			if i > 2*c-h:
+				new_rows[i] = (
+					merge_in(
+						rows[i],
+						rows[h-i-1]
+					)
+				)
+	if along == 'x':
+		new_rows = make_matrix(len(rows), c)
+		for j in range(0, c):
+			if j > 2*c-w:
+				new_rows = (
+					set_column(new_rows, j, merge_in(
+						get_column(rows, j),
+						get_column(rows, w-j-1)
+					))
+				)
+	return new_rows
+
+def count_dots(rows):
+	count = 0
+	for r in rows:
+		for c in r:
+			if c: count += 1
+	return count
+
+def main():
+	X, Y, folds, rows = parse_input(fileinput.input())
+	after_fold = rows.copy()
+	for along, c in folds:
+		after_fold = fold_along(after_fold, along, c)
+		count = count_dots(after_fold)
+		print(count)
+
+	draw_board(after_fold)
+
+main()

13_day/example.txt

@@ -0,0 +1,21 @@
+6,10
+0,14
+9,10
+0,3
+10,4
+4,11
+6,0
+6,12
+4,1
+0,13
+10,12
+3,4
+3,0
+8,4
+1,10
+2,14
+8,10
+9,0
+
+fold along y=7
+fold along x=5

13_day/input.txt

@@ -0,0 +1,729 @@
+1302,268
+872,390
+164,653
+1257,768
+649,367
+314,747
+239,246
+572,431
+610,427
+495,876
+321,8
+457,553
+1174,140
+470,728
+216,266
+142,502
+611,831
+475,630
+216,504
+845,23
+99,427
+1037,334
+381,112
+616,859
+982,876
+561,322
+249,99
+987,652
+793,729
+606,579
+1017,140
+679,81
+544,0
+1274,259
+1235,246
+1200,266
+903,588
+807,103
+17,455
+527,829
+512,144
+523,37
+976,140
+662,490
+570,180
+1159,791
+816,271
+740,266
+149,805
+570,266
+410,92
+1235,462
+363,45
+1004,362
+331,204
+724,462
+845,247
+395,138
+758,816
+939,511
+472,189
+184,750
+1295,134
+513,745
+735,140
+1179,37
+1009,135
+331,690
+704,355
+502,498
+274,614
+308,427
+216,180
+5,864
+1287,305
+1046,859
+807,327
+117,229
+326,18
+1093,840
+572,802
+1253,683
+262,721
+786,679
+987,764
+1061,99
+610,467
+473,775
+53,560
+1126,840
+267,885
+792,82
+631,253
+704,539
+0,360
+1216,14
+60,428
+552,485
+1295,312
+199,437
+206,91
+1262,355
+989,310
+1292,733
+982,18
+1044,416
+407,588
+1126,40
+556,609
+1208,814
+766,378
+1049,259
+23,589
+1101,480
+1223,44
+681,324
+1206,544
+306,114
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+503,327
+1293,439
+853,553
+463,376
+959,529
+490,260
+783,491
+596,208
+750,880
+447,287
+15,299
+431,434
+131,37
+934,763
+947,334
+73,521
+8,178
+935,278
+136,562
+1009,725
+740,180
+648,490
+415,716
+311,376
+730,801
+115,392
+952,145
+1076,732
+1171,365
+1245,850
+792,562
+32,528
+465,247
+771,112
+353,583
+1235,866
+246,802
+922,245
+1250,390
+1140,728
+102,78
+422,14
+487,242
+1186,747
+597,659
+539,502
+596,462
+1250,652
+438,504
+689,306
+75,246
+699,831
+328,86
+184,502
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+703,40
+351,164
+977,397
+638,173
+808,498
+691,437
+0,260
+480,274
+725,829
+115,502
+393,655
+875,471
+967,749
+115,54
+1278,366
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+964,285
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+1067,735
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+
+fold along x=655
+fold along y=447
+fold along x=327
+fold along y=223
+fold along x=163
+fold along y=111
+fold along x=81
+fold along y=55
+fold along x=40
+fold along y=27
+fold along y=13
+fold along y=6
+

rename.sh

@@ -0,0 +1,13 @@
+for f in *_day
+do
+    fullfile="$f"
+    filename=$(basename "$fullfile")
+    new=$(echo $filename | awk '{split($1,a,"_"); printf "%s",a[1]}')
+    len=$(echo -n "$new" | wc -c)
+    if [[ $len == 1 ]]; then
+        new="0"$filename
+    else
+        new=$filename
+    fi
+    mv $filename $new
+done