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aoc_07b.py
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aoc_07b.py
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from itertools import permutations
fin = open('input_07.txt')
temp = fin.readline().split(',')
fin.close()
program_template = [int(x) for x in temp]
# program_template = [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]
# program_template = [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]
def pexec(p, pc, in_queue, out_queue):
def g_o(pc, opnum): # get operand
modes = p[pc] // 100
m = [0, 0, 0, 0]
m[1] = modes % 10
modes = modes // 10
m[2] = modes % 10
modes = modes // 10
m[3] = modes % 10
if opnum == 3: # target address for write operations
return p[pc + opnum]
if m[opnum] == 0: # immediate or positional input values
return p[p[pc + opnum]]
else:
return p[pc + opnum]
while True:
# decode instruction
opcode = p[pc] % 100
if opcode == 99: # terminate
return 'END', pc
elif opcode == 1: # add
p[g_o(pc, 3)] = g_o(pc, 1) + g_o(pc, 2)
pc += 4
elif opcode == 2: # multiply
p[g_o(pc, 3)] = g_o(pc, 1) * g_o(pc, 2)
pc += 4
elif opcode == 3: # input
# inp = int(input('Input at location ' + str(pc) + ' : '))
if in_queue == []:
return 'WAIT', pc
inp = in_queue.pop(0)
p[p[pc + 1]] = inp
pc += 2
elif opcode == 4: # print
# print(g_o(pc, 1))
out_queue.append(g_o(pc, 1))
pc += 2
elif opcode == 5: # jump-if-true
if g_o(pc, 1) != 0:
pc = g_o(pc, 2)
else:
pc += 3
elif opcode == 6: # jump-if-false
if g_o(pc, 1) == 0:
pc = g_o(pc, 2)
else:
pc += 3
elif opcode == 7: # less than
if g_o(pc, 1) < g_o(pc, 2):
p[g_o(pc, 3)] = 1
else:
p[g_o(pc, 3)] = 0
pc += 4
elif opcode == 8: # equal
if g_o(pc, 1) == g_o(pc, 2):
p[g_o(pc, 3)] = 1
else:
p[g_o(pc, 3)] = 0
pc += 4
else: # unknown opcode
return 'ERROR', pc
max_thrust = 0
for phases in permutations([5, 6, 7, 8, 9]):
# programs for the amplifiers
pA = program_template[:]
pB = program_template[:]
pC = program_template[:]
pD = program_template[:]
pE = program_template[:]
# input queues (also target for output)
qA = [phases[0], 0]
qB = [phases[1]]
qC = [phases[2]]
qD = [phases[3]]
qE = [phases[4]]
# program counters
pcA = 0
pcB = 0
pcC = 0
pcD = 0
pcE = 0
# amplifier states
stateA = 'WAIT'
stateB = 'WAIT'
stateC = 'WAIT'
stateD = 'WAIT'
stateE = 'WAIT'
while True:
# print('Before:', qA, qB, qC, qD, qE)
if stateA == 'WAIT':
stateA, pcA = pexec(pA, pcA, qA, qB)
# print('A:', stateA, pcA, qA, qB)
if stateB == 'WAIT':
stateB, pcB = pexec(pB, pcB, qB, qC)
# print('B:', stateB, pcB, qB, qC)
if stateC == 'WAIT':
stateC, pcC = pexec(pC, pcC, qC, qD)
# print('C:', stateC, pcC, qC, qD)
if stateD == 'WAIT':
stateD, pcD = pexec(pD, pcD, qD, qE)
# print('D:', stateD, pcD, qD, qE)
if stateE == 'WAIT':
stateE, pcE = pexec(pE, pcE, qE, qA)
# print('E:', stateE, pcE, qE, qA)
# print('After:', qA, qB, qC, qD, qE)
# bla = input()
if stateE == 'END':
break
if qA[0] > max_thrust:
max_thrust = qA[0]
print(max_thrust)