Jun 2, 2024
diff --git a/ch09-lists-tuples-and-dictionaries/9a-challenge-cats-with-hats.py b/ch09-lists-tuples-and-dictionaries/9a-challenge-cats-with-hats.py
 # 9.9 - Challenge: Cats With Hats
 # Solution to challenge


 def get_cats_with_hats(array_of_cats):
    cats_with_hats_on = []
    # We want to walk around the circle 100 times
    for num in range(1, 100 + 1):
        # Each time we walk around, we visit 100 cats
        for cat in range(1, 100 + 1):
            # Determine whether to visit the cat
            # Use modulo operator to visit every 2nd, 3rd, 4th,... etc.
            if cat % num == 0:
                # Remove or add hat depending on
                # whether the cat already has one
                if array_of_cats[cat] is True:
                    array_of_cats[cat] = False
 ct_hats = []
 numberoftrue = 0
 def determinect_hats():
    # create a list of 100 false values in before round 1 which shows no hat on cat
    catswithhat = [False]*100
    # now start from round 1
    for rounds in range(1,101):
        #start with cat 1
        for cats in range(1,101):
            # logic as per the rounds
            if (cats%rounds ==0):
                # cats-1 because catswithhat has index from 0 to 99 which counts to 100 values
                # the for loop for cats end with 100 so cats-1
                if catswithhat[cats-1] == True:
                    catswithhat[cats-1] = False
                else:
                    array_of_cats[cat] = True

    # Add all number of each cat with a hat to list
    for cat in range(1, 100 + 1):
        if array_of_cats[cat] is True:
            cats_with_hats_on.append(cat)

    # Return the resulting list
    return cats_with_hats_on
                    catswithhat[cats-1] = True
 # tracking the indices using below code and storing the index value only if value is true
    true_indexes = [index for index, value in enumerate(catswithhat) if value]
    return (catswithhat.count(True)),(true_indexes)

 numberoftrue,index_list = determinect_hats()
 print(numberoftrue)

 # Cats contains whether each cat already has a hat on,
 # by default all are set to false since none have been visited
 cats = [False] * (100 + 1)
 print(get_cats_with_hats(cats))
 #index+1 should be added because index starts from 0
 new_index_list = [x+1 for x in index_list]
 print(new_index_list)
Original file line number	Diff line number	Diff line change
		@@ -1,33 +1,27 @@
		# 9.9 - Challenge: Cats With Hats
		# Solution to challenge


		def get_cats_with_hats(array_of_cats):
		cats_with_hats_on = []
		# We want to walk around the circle 100 times
		for num in range(1, 100 + 1):
		# Each time we walk around, we visit 100 cats
		for cat in range(1, 100 + 1):
		# Determine whether to visit the cat
		# Use modulo operator to visit every 2nd, 3rd, 4th,... etc.
		if cat % num == 0:
		# Remove or add hat depending on
		# whether the cat already has one
		if array_of_cats[cat] is True:
		array_of_cats[cat] = False
		ct_hats = []
		numberoftrue = 0
		def determinect_hats():
		# create a list of 100 false values in before round 1 which shows no hat on cat
		catswithhat = [False]*100
		# now start from round 1
		for rounds in range(1,101):
		#start with cat 1
		for cats in range(1,101):
		# logic as per the rounds
		if (cats%rounds ==0):
		# cats-1 because catswithhat has index from 0 to 99 which counts to 100 values
		# the for loop for cats end with 100 so cats-1
		if catswithhat[cats-1] == True:
		catswithhat[cats-1] = False
		else:
		array_of_cats[cat] = True

		# Add all number of each cat with a hat to list
		for cat in range(1, 100 + 1):
		if array_of_cats[cat] is True:
		cats_with_hats_on.append(cat)

		# Return the resulting list
		return cats_with_hats_on
		catswithhat[cats-1] = True
		# tracking the indices using below code and storing the index value only if value is true
		true_indexes = [index for index, value in enumerate(catswithhat) if value]
		return (catswithhat.count(True)),(true_indexes)

		numberoftrue,index_list = determinect_hats()
		print(numberoftrue)

		# Cats contains whether each cat already has a hat on,
		# by default all are set to false since none have been visited
		cats = [False] * (100 + 1)
		print(get_cats_with_hats(cats))
		#index+1 should be added because index starts from 0
		new_index_list = [x+1 for x in index_list]
		print(new_index_list)