52 lines
1.2 KiB
Python
52 lines
1.2 KiB
Python
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#!/usr/bin/python
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import re
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RE_INGRADIENT_INFO = re.compile(r'^(.*): capacity (-?\d+), durability (-?\d+), flavor (-?\d+), texture (-?\d+), calories (-?\d+)$')
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def read_file(filename):
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file = open(filename, 'r')
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while True:
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line = file.readline()
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if not line:
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break
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yield line
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def bottle_usage_positions(minCount, maxCount, pos, usage):
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if pos == len(usage):
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yield usage
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return
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for x in range(minCount, maxCount+1):
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usage[pos] = x
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for b in bottle_usage_positions(minCount, maxCount, pos+1, usage):
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yield b
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usage[pos] = minCount
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def calculate_liters(bottles, usage):
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sum = 0
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bottles_used = 0
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for x in range(len(bottles)):
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sum += bottles[x] * usage[x]
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bottles_used += usage[x]
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return (sum, bottles_used)
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def main():
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input = 150
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bottles = []
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bottle_usage = []
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for line in read_file('input'):
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bottles.append(int(line))
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bottle_usage.append(0)
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for usage in bottle_usage_positions(0, 1, 0, bottle_usage):
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(litres, used) = calculate_liters(bottles, usage)
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if litres == input:
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print used
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if __name__ == "__main__":
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main()
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