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https://github.com/peter-tanner/advent-of-code-2020.git
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65 lines
1.5 KiB
Python
65 lines
1.5 KiB
Python
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import itertools
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from copy import deepcopy
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cups = [ int(x) for x in list(str(389125467)) ]
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size = len(cups)
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def showcursor(cups, idx):
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cups_ = deepcopy(cups)
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cups_[idx] = '('+str(cups_[idx])+')'
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return cups_
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maxv = max(cups)
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def getdest(cups, value):
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idx_ = value - 1
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while True:
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if idx_ in cups:
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return cups.index(idx_)
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else:
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idx_ -= 1
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if idx_ < 0:
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idx_ = maxv
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def pick(cups, idx):
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buf = []
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d = 0
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for i in range(0,3):
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if idx in range(len(cups)):
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buf.append(cups.pop(idx))
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else:
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buf.append(cups.pop(0))
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d += 1
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return [buf,d]
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pointer = 0
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i = 0
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# while i < 100:
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while i < 10^6:
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# print(showcursor(cups, pointer))
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val = cups[pointer]
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buf = pick(cups,pointer+1)
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if pointer+1 in range(len(cups)):
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next_ptr_value = cups[pointer+1]
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else:
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next_ptr_value = cups[0]
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dest = getdest(cups,val)+1
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# print('dest:', dest, cups[dest-1])
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# print(next_ptr_value)
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# print('buf:', buf)
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if dest < len(cups):
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[cups.insert(dest,x) for x in buf[0][::-1]]
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else:
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# print('alt')
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[cups.append(x) for x in buf[0]]
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i += 1
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pointer = cups.index(next_ptr_value)
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# print('nextptr', pointer, next_ptr_value)
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# print(showcursor(cups, pointer))
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# print()
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print(cups)
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pointer = cups.index(1)
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print(int(''.join([ str(cups[x%len(cups)]) for x in range(pointer,pointer+len(cups)) ][1:])))
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