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puzzle07.py
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192 lines (180 loc) · 6.7 KB
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from itertools import permutations
def run(input_program, input_values):
program = input_program[:]
index = 0
prints = []
while True:
instruction = program[index]
op_str = f"{instruction:05}" # pad with zeros if necessary
op = op_str[-2:]
A, B, C = op_str[0], op_str[1], op_str[2]
jump = False
# add
if op == '01':
nincrement = 4
if C == '0':
first = program[program[index + 1]]
else:
first = program[index + 1]
if B == '0':
second = program[program[index + 2]]
else:
second = program[index + 2]
assert A == '0'
program[program[index + 3]] = first + second
# multiply
elif op == '02':
nincrement = 4
if C == '0':
# position
first = program[program[index + 1]]
else:
# immediate
first = program[index + 1]
if B == '0':
second = program[program[index + 2]]
else:
second = program[index + 2]
assert A == '0'
program[program[index + 3]] = first * second
# input saved to address
elif op == '03':
nincrement = 2
assert C == '0'
addr = program[index + 1]
if len(input_values) > 0:
input_value = input_values.pop(0)
program[addr] = input_value
else:
# we need to wait, so we just exit
return program, prints, False
# output
elif op == '04':
nincrement = 2
if C == '0':
addr = program[index + 1]
else:
addr = index + 1
prints.append(program[addr])
# jump if true
elif op == '05':
if C == '0':
first_param = program[program[index + 1]]
else:
first_param = program[index + 1]
if B == '0':
second_param = program[program[index + 2]]
else:
second_param = program[index + 2]
if first_param != 0:
jump = True
new_index = second_param
else:
nincrement = 3
# jump if false
elif op == '06':
if C == '0':
first_param = program[program[index + 1]]
else:
first_param = program[index + 1]
if B == '0':
second_param = program[program[index + 2]]
else:
second_param = program[index + 2]
if first_param == 0:
jump = True
new_index = second_param
else:
nincrement = 3
# less than
elif op == '07':
nincrement = 4
if C == '0':
first = program[program[index + 1]]
else:
first = program[index + 1]
if B == '0':
second = program[program[index + 2]]
else:
second = program[index + 2]
assert A == '0'
if first < second: # strict?
program[program[index + 3]] = 1
else:
program[program[index + 3]] = 0
# equals
elif op == '08':
nincrement = 4
if C == '0':
first = program[program[index + 1]]
else:
first = program[index + 1]
if B == '0':
second = program[program[index + 2]]
else:
second = program[index + 2]
assert A == '0'
if first == second:
program[program[index + 3]] = 1
else:
program[program[index + 3]] = 0
# end program
elif op == '99':
break
else:
raise NotImplementedError()
if jump:
index = new_index
del new_index
else:
index = index + nincrement
del nincrement
return program, prints, True
def iterate(program, seq):
state, prints, is_finished = run(program, input_values=[seq[0], 0])
state, prints, is_finished = run(program, input_values=[seq[1], prints[0]])
state, prints, is_finished = run(program, input_values=[seq[2], prints[0]])
state, prints, is_finished = run(program, input_values=[seq[3], prints[0]])
state, prints, is_finished = run(program, input_values=[seq[4], prints[0]])
return prints[0]
# unit tests part1
program = list(map(int, "3,15,3,16,1002,16,10,16,1,16,15,15,4,15,99,0,0".split(',')))
assert iterate(program, [4, 3, 2, 1, 0]) == 43210
program = list(map(int, "3,23,3,24,1002,24,10,24,1002,23,-1,23,101,5,23,23,1,24,23,23,4,23,99,0,0".split(',')))
assert iterate(program, [0, 1, 2, 3, 4]) == 54321
program = list(map(int,
"3,31,3,32,1002,32,10,32,1001,31,-2,31,1007,31,0,33,1002,33,7,33,1,33,31,31,1,32,31,31,4,31,99,0,0,0".split(
',')))
assert iterate(program, [1, 0, 4, 3, 2]) == 65210
# part1 solution
program = list(map(int, open('data/input07').read().split(',')))
all_perms = permutations([0, 1, 2, 3, 4])
print(f'solution for part1: {max(iterate(program, seq) for seq in all_perms)}')
# part2 new code
def iterate_feedback(program, seq):
inp1 = [seq[0], 0]
is_finished = False
while not is_finished:
state, prints, is_finished = run(program, input_values=inp1)
inp2 = [seq[1], *prints]
state, prints, is_finished = run(program, input_values=inp2)
inp3 = [seq[2], *prints]
state, prints, is_finished = run(program, input_values=inp3)
inp4 = [seq[3], *prints]
state, prints, is_finished = run(program, input_values=inp4)
inp5 = [seq[4], *prints]
state, prints, is_finished = run(program, input_values=inp5)
inp1 = [seq[0], 0, *prints]
return prints[-1]
# unit tests part2
program = list(
map(int, "3,26,1001,26,-4,26,3,27,1002,27,2,27,1,27,26,27,4,27,1001,28,-1,28,1005,28,6,99,0,0,5".split(',')))
assert iterate_feedback(program, [9, 8, 7, 6, 5]) == 139629729
program = list(map(int,
"3,52,1001,52,-5,52,3,53,1,52,56,54,1007,54,5,55,1005,55,26,1001,54,-5,54,1105,1,12,1,53,54,53,1008,54,0,55,1001,55,1,55,2,53,55,53,4,53,1001,56,-1,56,1005,56,6,99,0,0,0,0,10".split(
',')))
assert iterate_feedback(program, [9, 7, 8, 5, 6]) == 18216
# part2 solution
program = list(map(int, open('data/input07').read().split(',')))
all_perms = permutations([5, 6, 7, 8, 9])
print(f'solution for part2: {max(iterate_feedback(program, seq) for seq in all_perms)}')