Completed day 17 of year 2015

Author: fschatbot

2015/17.py

@@ -1,26 +1,47 @@
 split_data = True
-completed = False
+completed = True
 raw_data = None # Not To be touched
 
-coms = 0
-
-def loop(canfit, containers, listing=[]):
-	global coms
-	for container in containers:
-		if container == canfit:
-			print([*listing, container])
-			coms += 1
-		elif container < canfit:
-			list2 = containers.copy()
-			list2.remove(container)
-			loop(canfit - container, list2, [*listing, container])
+from functools import cache			
 
 def part1(data):
 	"""The Code is supposed to run here"""
-	containers = [int(container) for container in data]
-	loop(25, containers)
-	return coms
+	containers = sorted([int(container) for container in data], reverse=True)
+
+	@cache
+	def try_fitting(remaining:int, index:int):
+		if remaining == 0:
+			return 1
+		elif remaining < 0 or index >= len(containers):
+			return 0 # We ran out of containers and still didn't achieve our goals
+		
+		use_it = try_fitting(remaining - containers[index], index+1) # We either use this container
+		no_use = try_fitting(remaining, index+1) # or we don't use it. 
+
+		# If the current container consumes too much, then it will automaticlly return 0
+		return use_it + no_use
+		
+	return try_fitting(150, 0)
 
 def part2(data):
 	"""The Code is supposed to run here"""
-	containers = [int(container) for container in data]
+	containers = [int(container) for container in data]
+
+	@cache
+	def try_fitting(remaining:int, index:int, counter:int):
+		if remaining == 0:
+			return counter, 1
+		elif remaining < 0 or index >= len(containers):
+			return float('inf'), 0 # We ran out of containers and still didn't achieve our goals
+		
+		use_it = try_fitting(remaining - containers[index], index+1, counter+1) # We either use this container
+		no_use = try_fitting(remaining, index+1, counter) # or we don't use it.
+
+		if use_it[0] < no_use[0]:
+			return use_it
+		elif use_it[0] > no_use[0]:
+			return no_use
+		else:
+			return use_it[0], use_it[1] + no_use[1]
+	
+	return try_fitting(150, 0, 0)[1]