95 lines
3.3 KiB
Python
95 lines
3.3 KiB
Python
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""" https://adventofcode.com/2019/day/9 """
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class InvalidOpcode(Exception):
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pass
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class mylist(list):
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def __getitem__(self, item):
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try:
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return super(mylist,self).__getitem__(item)
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except IndexError as e:
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if item < 0: raise IndexError()
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super(mylist,self).extend([0]*(item + 1 - super(mylist,self).__len__()))
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return super(mylist,self).__getitem__(item)
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def __setitem__(self, idx, val):
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try:
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return super(mylist,self).__setitem__(idx,val)
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except IndexError as e:
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if idx < 0: raise IndexError()
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super(mylist,self).extend([0]*(idx + 1 - super(mylist,self).__len__()))
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return super(mylist,self).__setitem__(idx,val)
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def readFile():
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with open(f"{__file__.rstrip('code.py')}input.txt", "r") as f:
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return [int(num) for num in f.readline().split(",")]
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def getOutput(vals : list, input=0, base=0):
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vals = mylist(vals)
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i = 0
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while 1:
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opcode = (vals[i] % 100,
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vals[i] // 100 % 10,
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vals[i] // 1000 % 10,
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vals[i] // 10000 % 10)
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# 0 Parameter
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if opcode[0] in [99]: # Termination
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return vals
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# 1 Parameter
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elif opcode[0] in [3,4,9]:
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a = vals[i+1] if not opcode[1] else i+1 if opcode[1] == 1 else base+vals[i+1]
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if opcode[0] == 3: # Input
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vals[a] = input
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elif opcode[0] == 4: # Output
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vals[0] = vals[a]
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elif opcode[0] == 9: # Adjust Base
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base += vals[a]
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i += 2
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# 2 Parameter
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elif opcode[0] in [5,6]:
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a = vals[i+1] if not opcode[1] else i+1 if opcode[1] == 1 else base+vals[i+1]
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b = vals[i+2] if not opcode[2] else i+2 if opcode[2] == 1 else base+vals[i+2]
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if opcode[0] == 5 and vals[a] != 0: # Jump-if-true
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i = vals[b]
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elif opcode[0] == 6 and vals[a] == 0: # Jump-if-false
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i = vals[b]
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else:
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i += 3
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# 3 Parameter
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elif opcode[0] in [1,2,7,8]:
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a = vals[i+1] if not opcode[1] else i+1 if opcode[1] == 1 else base+vals[i+1]
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b = vals[i+2] if not opcode[2] else i+2 if opcode[2] == 1 else base+vals[i+2]
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c = vals[i+3] if not opcode[3] else i+3 if opcode[3] == 1 else base+vals[i+3]
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if opcode[0] == 1: # Addition
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vals[c] = vals[a] + vals[b]
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elif opcode[0] == 2: # Multiplication
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vals[c] = vals[a] * vals[b]
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elif opcode[0] == 7: # Less Than
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vals[c] = int(vals[a] < vals[b])
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elif opcode[0] == 8: # Equals
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vals[c] = int(vals[a] == vals[b])
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i += 4
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else:
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raise InvalidOpcode()
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def part1(vals : list):
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return getOutput(vals.copy(), input=1)[0]
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def part2(vals : list):
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return getOutput(vals.copy(), input=2)[0]
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def test():
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assert getOutput([104,1125899906842624,99])[0] == 1125899906842624
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assert len(getOutput([109,19,204,-34,99], base=2000)) == 1986
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assert len(str(getOutput([1102,34915192,34915192,7,4,7,99,0])[0])) == 16
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if __name__ == "__main__":
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test()
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vals = readFile()
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print(f"Part 1: {part1(vals)}")
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print(f"Part 2: {part2(vals)}")
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