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intcode.py
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intcode.py
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#!/usr/bin/python3
# -*- coding: utf-8 -*-
import sys
DEPTH_MAX = 5
PHASE_MIN = 0
PHASE_MAX = 4
BEST_RESULT = 0
BEST_CONFIG = []
def decode_opcode(value):
op = value % 100
value = value // 100
argmode = []
for i in range(3):
argmode.append(value % 10)
value = value // 10
return op, argmode
def get_val(ints, position, mode):
if mode == 0:
return ints[position]
elif mode == 1:
return position
else:
print("What the fuck", file=sys.stderr)
exit(1)
def run_script(ints, input):
ints = ints.copy()
output = []
pos = 0
while True:
op, argmode = decode_opcode(ints[pos])
if op == 1:
arg1 = ints[pos+1]
arg2 = ints[pos+2]
arg3 = ints[pos+3]
pos += 4
ints[arg3] = get_val(ints, arg1, argmode[0]) + get_val(ints, arg2, argmode[1])
elif op == 2:
arg1 = ints[pos+1]
arg2 = ints[pos+2]
arg3 = ints[pos+3]
pos += 4
ints[arg3] = get_val(ints, arg1, argmode[0]) * get_val(ints, arg2, argmode[1])
elif op == 3:
arg = ints[pos+1]
pos += 2
ints[arg] = input.pop(0)
elif op == 4:
arg = ints[pos+1]
pos += 2
output.append(get_val(ints, arg, argmode[0]))
# print("Opcode 4: {}".format(get_val(ints, arg, argmode[0])))
elif (op == 5) or (op == 6):
arg1 = ints[pos+1]
arg2 = ints[pos+2]
val = get_val(ints, arg1, argmode[0])
if ((op == 5) and (val != 0)) or ((op == 6) and (val == 0)):
pos = get_val(ints, arg2, argmode[1])
else:
pos += 3
elif (op == 7) or (op == 8):
arg1 = ints[pos+1]
arg2 = ints[pos+2]
arg3 = ints[pos+3]
pos += 4
val1 = get_val(ints, arg1, argmode[0])
val2 = get_val(ints, arg2, argmode[1])
condition = ((op == 7) and (val1 < val2)) or ((op == 8) and (val1 == val2))
ints[arg3] = 1 if condition else 0
elif op == 99:
break
else:
print("Unknown opcode \"{}\"".format(ints[pos]), file=sys.stderr)
exit(1)
return output
def str_to_ints(string):
return list(map(lambda x: int(x), string.split(',')))
def ints_to_str(ints):
return ",".join(list(map(lambda x: str(x), ints)))
def run(depth, script, input, history):
global DEPTH_MAX
global PHASE_MIN
global PHASE_MAX
global BEST_RESULT
global BEST_CONFIG
for phase in range(PHASE_MIN, PHASE_MAX+1):
if phase in history: continue
newhist = history.copy()
newhist.append(phase)
output = run_script(script, [phase,input])
output = output[0]
if depth < DEPTH_MAX:
run(depth+1, script, output, newhist)
else:
print("{} ---> {}".format(ints_to_str(BEST_CONFIG), output))
if output > BEST_RESULT:
BEST_RESULT = output
BEST_CONFIG = newhist
if __name__ == "__main__":
script = str_to_ints(sys.stdin.read())
run(1, script, 0, [])
print("!! {} ---> {}".format(ints_to_str(BEST_CONFIG), BEST_RESULT))