thib8956/advent-of-code-2k19
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

Day 5 challenge #1

Merged
thib8956 merged 3 commits from wip into master 2019-12-16 21:06:50 +00:00
Conversation 0 Commits 3 Files Changed 2 +124 -84
1 changed files with 124 additions and 84 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files
Showing only changes of commit d441db73e5 - Show all commits

206
day5/day5.py
View File

@ -1,89 +1,122 @@
#! /usr/bin/env python3
from collections import namedtuple
from enum import Enum
import logging
logging.basicConfig(format="%(levelname)s:%(message)s", level=logging.DEBUG)
def decode_opcode(inp):
opcode = inp % 100 # 2-digit opcode
a = (inp // 10000) % 10 # mode of 1st param
b = (inp // 1000) % 10 # mode of 2nd param
c = (inp // 100) % 10 # mode of 3rd param
# ABC DE
# ^^^ ^^
# MODE OPCODE
return a, b, c, opcode
def get_nth_digit(n, number):
"Returns the nth digit of the input number"
return number // n ** 10 % 10
def decode_parameters(input_prog, ip, modes):
"""
Returns the adress of the parameters according to the input modes.
if mode[n] == 1: direct access, else indirect access
"""
param1 = input_prog[ip + 1] if modes[2] == 0 else (ip + 1)
param2 = input_prog[ip + 2] if modes[1] == 0 else (ip + 2)
param3 = input_prog[ip + 3] if modes[0] == 0 else (ip + 3)
return param1, param2, param3
class Operation(Enum):
ADDITION = 1
MULTIPLICATION = 2
INPUT = 3
OUTPUT = 4
JMP_IF_TRUE = 5
JMP_IF_FALSE = 6
LESS_THAN = 7
EQUALS = 8
TERMINATION = 99
class Mode(Enum):
POSITION = 0
IMMEDIATE = 1
def interpret_intcode(input_prog, stdin=None):
# Instruction pointer: index of the next element to be executed
class Instruction:
def __init__(self, opcode):
self.operation = Operation(opcode % 100)
self.modes = [Mode(get_nth_digit(n, opcode)) for n in range(2, 5)]
self.handler_name = f"handle_{self.operation.name.lower()}"
self.handler = getattr(self, self.handler_name, self.handle_termination)
def __repr__(self):
return f"Instruction({self.operation}, {self.modes})"
def handle(self, program, ip):
return self.handler(program, ip)
def handle_addition(self, program, ip):
first, second = self._get_parameters(program, ip)
logging.debug(f"ADD {first} {second}")
result = first + second
# the last mode should *always* be POSITION
program[program[ip + 3]] = result
ip += 4
return ip
def handle_multiplication(self, program, ip):
first, second = self._get_parameters(program, ip)
logging.debug(f"MUL {first} {second}")
result = first * second
# the last mode should *always* be POSITION
program[program[ip + 3]] = result
ip += 4
return ip
def handle_input(self, program, ip):
ip += 2
program[program[ip + 1]] = int(input("Enter ID > "))
return ip
def handle_output(self, program, ip):
print("OUT ", program[program[ip + 1]])
ip += 2
return ip
def handle_jmp_if_true(self, program, ip):
first, second = self._get_parameters(program, ip)
logging.debug(f"JMPT {first} {second}")
return second if first != 0 else ip + 3
def handle_jmp_if_false(self, program, ip):
first, second = self._get_parameters(program, ip)
logging.debug(f"JMPF {first} {second}")
return second if first == 0 else ip + 3
def handle_less_than(self, program, ip):
first, second = self._get_parameters(program, ip)
logging.debug(f"LT {first} {second}")
program[program[ip + 3]] = int(first < second)
ip += 4
return ip
def handle_equals(self, program, ip):
first, second = self._get_parameters(program, ip)
logging.debug(f"EQ {first} {second}")
program[program[ip + 3]] = int(first == second)
ip += 4
return ip
def handle_termination(self, program, ip):
print("HALT")
return ip
def _get_parameters(self, program, ip):
first = (
program[ip + 1]
if self.modes[0] is Mode.IMMEDIATE
else program[program[ip + 1]]
)
second = (
program[ip + 2]
if self.modes[1] is Mode.IMMEDIATE
else program[program[ip + 2]]
)
return first, second
def interpret_intcode(program, stdin=None):
ip = 0
while ip < len(input_prog):
instruction = input_prog[ip]
*modes, opcode = decode_opcode(instruction)
if opcode == 99:
break
parameters = decode_parameters(input_prog, ip, modes)
if opcode == 1: # ADD
print("ADD", " ".join(str(input_prog[p]) for p in parameters))
input_prog[parameters[2]] = input_prog[parameters[0]] + input_prog[parameters[1]]
ip += 4
elif opcode == 2: # MUL
print("MUL", " ".join(str(input_prog[p]) for p in parameters))
input_prog[parameters[2]] = input_prog[parameters[0]] * input_prog[parameters[1]]
ip += 4
elif opcode == 3: # IN
input_prog[parameters[1]] = stdin
ip += 2
elif opcode == 4: # OUT
if input_prog[ip + 1] == 99:
print("End of execution")
break
print("OUT ", input_prog[parameters[1]])
ip += 2
elif opcode == 5: # JMP if true
if input_prog[parameters[0]] != 0:
print("JT", " ".join(str(input_prog[p]) for p in parameters))
ip = input_prog[parameters[1]]
else:
ip += 3
elif opcode == 6: # JMP if false
if input_prog[parameters[0]] == 0:
print("JF", " ".join(str(input_prog[p]) for p in parameters))
ip = input_prog[parameters[1]]
else:
ip += 3
elif opcode == 7: # LT
print("LT", " ".join(str(input_prog[p]) for p in parameters))
res = int(input_prog[parameters[0]] < input_prog[parameters[1]])
input_prog[parameters[2]] = res
ip += 4
elif opcode == 8: # EQ
print("EQ", " ".join(str(input_prog[p]) for p in parameters))
res = int(input_prog[parameters[1]] == input_prog[parameters[2]])
input_prog[parameters[2]] = res
ip += 4
while program[ip] != 99:
opcode = program[ip]
instruction = Instruction(opcode)
ip = instruction.handle(program, ip)
def tests():
@ -92,12 +125,14 @@ def tests():
[2, 3, 0, 3, 99], # MUL 2 * 3 to location 3
[2, 4, 4, 5, 99, 0],
[1, 1, 1, 4, 99, 5, 6, 0, 99],
[1101, 1, 1, 0, 99], # ADD 1 + 1 to location 0 (direct access)
)
expected_outputs = (
[2, 0, 0, 0, 99], # 1 + 1 = 2
[2, 3, 0, 6, 99], # 3 * 2 = 6
[2, 4, 4, 5, 99, 9801], # 99 * 99 = 9801
[30, 1, 1, 4, 2, 5, 6, 0, 99],
[2, 1, 1, 0, 99], # 1 + 1 = 2 (direct access)
)
for i, inp in enumerate(inputs):
result = inp[:]
@ -108,16 +143,21 @@ def tests():
print("\nAll tests passed.\n")
def run_input_program(filename):
import os
SCRIPT_DIR = os.path.dirname(os.path.realpath(__file__))
with open(os.path.join(SCRIPT_DIR, filename)) as inp:
print("Start of input program.")
memory = [int(x) for x in inp.readline().strip().split(",")]
interpret_intcode(memory, 5)
if __name__ == "__main__":
tests()
# tests()
# a = [3, 12, 6, 12, 15, 1, 13, 14, 13, 4, 13, 99, -1, 0, 1, 9]
# b = [3, 3, 1105, -1, 9, 1101, 0, 0, 12, 4, 12, 99, 1]
# interpret_intcode(b, 0)
# interpret_intcode(a, 0)
with open("input.txt") as inp:
print("Start of input program.")
memory = [int(x) for x in inp.readline().strip().split(",")]
interpret_intcode(memory, 5)
run_input_program("input.txt")