AoC 2020: day18

Signed-off-by: Ettore Dreucci <ettore.dreucci@gmail.com>
This commit is contained in:
2020-12-18 21:30:59 +01:00
parent 77cf797cc8
commit daca09ae65
3 changed files with 497 additions and 0 deletions

371
2020-python/inputs/day_18 Normal file
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6 + (4 + (3 + 3 + 6 + 2) + (4 + 9 * 7 + 4 + 8) * 5 * 5) + 4
4 * 7 + (2 + 2)
(3 + 2 * 8 * 8 + 3 + 3) + 5 + 7 * 5
(2 * 5 + (8 * 6 + 2 + 4 + 4 + 8)) * 2 * (8 + 8 * 5) + (2 + 9 * (9 * 3) * (6 * 7 + 7) * 2 + 4) * 6
5 + 2 * 9 * 8 + 5 * ((7 * 8 + 3 * 6) + 2 * 6 + 2)
7 * 2 + (8 * 5) * 7 + (2 + 2 + 4)
5 * 6 + 8 * ((2 + 3 + 6 + 8 * 8) * 8 + 5)
4 + 4 * 4 + (7 * 4)
(7 * 3 * 4 * 8) + 3 * 2 + 8 + 2 + 3
2 * 8 + (2 * 4 * 6 + 8) + 2 * 7
(5 + (7 + 5) + 6 + (7 + 7 + 7 * 8 + 5 + 4) + (8 * 8)) + 8 * (7 * 9 + 8) * 6 + 3 * (9 + 6 * 3)
9 * 9 + ((6 + 4 + 6 * 6) + 9 + 6) * (8 + 4 + 4 * (3 * 3 + 8) * 3 * 9) + 6 * 2
(9 + (8 * 7 + 4 * 5 + 8 + 9)) * ((2 + 8 * 2 + 2) * 8 + 2) * 9 + (2 + 9) + (2 * 4 * (3 + 4 * 3 + 7 * 4 * 7))
2 * 6 * 3 * 7 * (4 + 6 + 8)
5 * 8 + (6 * 5 * 5 + 9 * (9 * 2 * 2 * 5 + 5 * 4)) + 4 * 2 + 8
(9 + 7 + 5) + 2 + 9 + 2 + (6 * 9 * 9)
9 + ((7 * 4) + 9 + (3 * 5)) * 8 * 6 * 6 * (3 + 3 + (8 * 9) + 7)
5 + 4 + 3 + 3 * 9 * 5
6 + 6 + ((5 + 4 + 6 + 9 * 5 + 4) * (8 * 9 * 8) + 3 + (8 + 2 * 4 + 4 + 3)) + 9
3 + 5 * 4 * 3 * (5 * 3) + 9
2 * 5 * 3 + 6 * (8 + (5 * 4 + 4 * 7 * 6 + 8) + 4 * 7) * 6
2 * ((3 * 2) + 7 * 9 + 7 + 8 * 6) * (9 + 8) * 8 * 8
3 * ((7 * 6 + 9) + (8 * 9 + 9 + 2 + 3)) * 5 + 2 + (3 * (6 * 6 + 7 * 9 + 8 * 9))
3 * 3 + (8 + (8 * 6 * 9 * 8 + 5 + 3) + 5 * 2 * 5 + 7)
3 + (6 + 5 * (4 * 2) + 8 * 3 + 6)
7 + 7 + 7 * 6 + 3 * ((2 + 5 + 4 * 9 + 2 * 9) * 5 * (8 * 4) + (9 + 5 * 8 + 8 + 6) * 4 * 5)
9 + (6 + 6 * (7 * 4 + 2 * 8 * 5))
(7 + (5 + 3 + 5 + 6 * 5)) * 8 + 9 * 8 + 5
(6 * 2 * 7) * (3 + 3 * 7 + (8 * 3 + 7 * 4 + 5)) + 7 * 3 + 4 + 2
4 * 9 * 3 + (3 * (3 + 4) * 3) * (2 * 5) + (4 + 4 * 2 * 4 * 7)
(8 + (6 * 7 + 5 * 3) + 5 * 4 + 7 * 8) * 3 + (6 * 9 + 7)
5 * 6 * 5 + 4 * 9 + (3 + 3 + 8 + 4)
(6 + 4 + 7 * 8) + 5 * 4 * 9
8 + (7 + 5 * 4 + 8 + 9 * 6) * 8 + 4
3 + 6 * 8 + 3 + (3 * 3 + 2 * 9) * 8
7 + 6 * 4 + 4
9 + 3 + ((2 + 8 * 5 * 5 + 2) * (8 * 7 + 7 * 3))
9 * 9 * (6 + (2 * 9 + 4 * 8 + 6) * 2 + 5) + (7 * 3 * 7 * 4)
4 * ((5 * 2 + 9) + 9) * 2 * 3 + (2 + (4 + 4 * 7) * 2 + 6)
3 + 6 + (8 * 7 * (7 * 8) + 3) + 5
(6 + (9 + 8 + 3 * 8 + 8 + 7) * (4 * 3 + 4 * 3) * 6 + (9 * 8 * 2)) * (6 * 5 + 4 * 4) * 6
((9 * 3 + 3 * 5 * 9) * 3 * 2 * 5 * 4 + 9) + 2 * 5 + 5 * 8 * 6
7 * 9 + 4 * ((3 + 7 + 2) + (8 + 7 + 9 * 8 * 6 * 2))
(5 * (3 + 5) * 3 * (3 + 6 + 3 + 4) + 8 + 9) + 9 + 6 * 4
3 + 9 * (3 + (4 + 7) + 2 + 3 + 7) * 8 * 6
(5 * 7 + 4 + 7 + (5 + 4 * 4 * 6 + 6)) + (9 + 3 + 2 + 2) + ((3 + 2 + 9 + 7 * 2 * 3) + 8 * 2 * 2 + 9 * 3)
3 + 7 + ((5 * 7) + 7 + 3 * (7 + 5 + 8) + (9 + 8 * 8) + 7)
5 * ((5 + 8 * 3 * 7) + 2 * 7 * 5 + (4 + 8 + 3) + 3)
(3 + 9 + 4) * ((3 * 6) + 5 * 7 * 6)
8 * 7
(5 * (2 + 9 + 4) + 8 * (8 + 7 * 7 + 5) + 6 * (2 + 4 * 7)) * 8 + 9
(4 + (3 + 7 * 4 * 2 * 7 + 8)) * 9 * 6
6 + 7 + 9 * (9 * 2 * 6) * 6 + 2
7 * 5 + (5 * 3 + 9 * 6 + (9 * 5 * 2 * 3) + 7)
3 * 5 + 7 + 2 + 3 * ((8 + 5 * 2 * 6 * 5) * (4 + 4 + 7 * 9 + 8 * 4) + (2 * 9 + 2 * 2 + 8))
(9 + 7 * 9 * 2) + 8 * 6
(9 * (7 + 8 + 9 + 5 + 5) * 2) * 3 + 5 + (7 * (6 * 8 + 9 * 4 * 4 + 8) + 6 + 6 * (9 + 8 + 4 + 6)) + 2
(3 * 9) + 4 * 9
4 + 7 * ((8 * 2 * 6 + 8 + 7 * 2) * 2)
2 * (6 + 3) + 4 + 7 * 4
(2 * 8 + 9) + (2 + 6) + (4 * 6)
7 * 2 + 9 + 7 * 3 + ((5 * 5 * 3) + 3 * 8 * 6 + 2 + 7)
((2 + 6) + (7 * 4 * 8 * 7 * 3) * (2 + 8 * 4) * 5 + 6 * 2) * (4 + 7 + 2 + 8 * (3 + 8) * 8) + (7 + 8 + 3 + 3) + 9 + 4
(3 * 4 * (9 + 4 + 6 * 7) + 2 + 2 + 8) + 4 + 6
(4 * (4 * 3 + 2 + 9) * 4) + 2 * 6 * 3 + 8 + 5
(3 + 9 + 7) * 8 + 9 + (4 * (7 + 7 + 8 + 7) * 8 * 3 + 5)
5 * 2 * (5 + 9 + 6 + (6 + 6) * 2 + 7)
7 * 7 + (2 + 2 * 5 * 6 + 2) + 4
8 * (2 + (9 * 2 + 2 + 7 + 7)) + 8 + 7 + 5 + 7
(5 + (9 * 8 * 3) * (2 * 2 + 8 + 8 * 5) + 7 * 3 + (8 + 9 + 2 + 6 + 3 + 7)) * 9
(4 + 8 + 9) + (6 + 3 * 4 * (4 + 2 + 4 * 2 + 8 + 2) + 8 * 3) + 5
6 + 3 + 2 + (2 + 6 + 7 + 2 + (7 + 3 * 9 + 3 * 5))
4 + 7 * 2 + 8 * 2
7 * 6 + 4
(2 * (5 * 3) * 9 * 3) * (3 + 7 + 6 * 5) * 4 * 9
3 + 9 * 2 + (8 * 4 + 8 * (3 + 3 + 2 * 3) + (9 + 5 * 8 * 6))
8 * (8 * 2 + 4 * 4 * 6) * 9 + 5 + 4
2 + 8 + (4 * 7 + (2 * 9 * 2 + 4 * 5 + 7) * 9 * 8 * 3) * 5 + 7 * 3
8 * 5 + 7 * 5 + (7 * (5 + 8) * 5 * (3 * 7 * 2 * 3 + 2)) + 5
8 * (2 * (5 + 3 * 6)) + 2 * ((7 * 6 * 7 + 2 * 2) + 8) * 6
((9 + 8 + 7 * 6 * 7 * 9) + (9 + 6 * 4 + 9 * 4 + 2) * (6 + 4 + 6 + 9 * 4)) * 7 * 8 * ((8 * 4 * 9 * 5 + 6 * 6) + 7 * 3 * 3 * (2 + 4 * 4))
4 + (8 * 7 * (9 + 6 * 8 + 8) * 7 * 4) + 2 * ((4 * 4 + 7 * 9 * 8 + 3) + 7 + 3 * 9 * 3) + 6
6 + ((5 * 2 + 9 + 9 + 7 * 7) * (2 + 9 + 6 * 8) + 9) * 3
(6 + 6 + 9 * (8 * 5 * 3 + 3 + 2) * 8) * 5 + 8 * (3 + 6 + 8 * 9 + (5 + 3 + 7)) * 5
8 * ((8 + 3 + 5) + 5 * 4 * 6) * ((7 * 3 * 2 * 7 + 8 + 8) * 7 + 9 * 5 + 2) * 8
9 * ((6 + 3 + 3) + 4 * 3) + 6
9 + ((9 * 8 + 3 + 5 + 6 + 3) * (7 * 5 * 6 + 5 + 6) * 5 + 8) * 4 + 8 + 6
2 * 4 * 2 * (8 + (7 * 5) + 8 * 3) * 7
8 + (6 * 8) * 9 * 2 + 3 * 7
(4 * 3 * 2 + 8) * (8 + (5 * 2 * 7) + 5 + (6 + 8 * 4 * 9 + 5 + 5) * 4) * 2 * 3 * 2 + 5
9 + 5 * 9 + (3 + 4) + (5 * 6 + 5)
9 * 9 * ((9 * 9) * 5 * 6 + 4 + 3) + 8 + 8 + (4 + 4 * 4 * (3 * 7 + 7 + 9 + 5 * 3))
9 + (3 * 2) + 2
((3 + 7 + 5 * 8) + 3 * 5 + 2 + 2) * (5 + 7 + 5) * (2 * 3 + 8 + 8 * (9 * 3 + 6 + 7 * 7))
((8 + 3 + 2) * 9) * 5 * 9 * 8 * 3 + 8
2 + 8 + 4 + 2 * 2
(8 * 9) + 9
6 + (4 * 8)
(5 + 9 * 7) * 9 + ((9 + 9) + 6 + 3 + 8) * (9 + 9 * (6 + 9))
((6 * 6 + 8 * 6) + 2 * (6 * 6) * (3 * 9 + 7 + 9 * 8) + 3) * (8 * (2 + 7 + 9 * 8) * 2) + 4 + 7 * 6
7 * (7 * 3 * 9 + 7) + (4 * 9 + (5 + 3 + 5) * 7) + (5 + 3 * 3 + 2) * 2
(6 * (2 * 7 * 3)) + 5
8 * ((7 * 4 * 4 * 3) * 3 * 5 + 6 + (2 * 5 + 5 + 2 * 8) * 9)

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@@ -0,0 +1,125 @@
"""AOC 2020 Day 18"""
import pathlib
import time
TEST_INPUT = """1 + (2 * 3) + (4 * (5 + 6))
2 * 3 + (4 * 5)
5 + (8 * 3 + 9 + 3 * 4 * 3)
5 * 9 * (7 * 3 * 3 + 9 * 3 + (8 + 6 * 4))
((2 + 4 * 9) * (6 + 9 * 8 + 6) + 6) + 2 + 4 * 2"""
def read_input(input_path: str) -> str:
"""take input file path and return a str with the file's content"""
with open(input_path, 'r') as input_file:
input_data = input_file.read().strip()
return input_data
def extract(input_data: str) -> list:
"""take input data and return the appropriate data structure"""
return [exp.rstrip() for exp in input_data.split('\n')]
def regular_op(stack: list, num: int) -> list:
"""return the stack after performing a regular math operation"""
while stack:
if stack[-1] == '(':
break
operator, left_operand = stack[-1], stack[-2]
stack = stack[:-2]
if operator == '+':
num = left_operand + num
elif operator == '*':
num = left_operand * num
stack.append(num)
return stack
def advanced_op(stack: list, num: int, sub_expr: bool) -> list:
"""return the stack after performing an advanced math operation"""
if sub_expr:
index = -1
for stack_index, value in enumerate(stack):
if value == '(':
index = stack_index
if index != -1:
target = stack[index+1:]
stack = stack[:index]
else:
target = stack
stack = []
for value in target:
if value != '*':
num *= int(value)
while stack:
if stack[-1] in '(*':
break
operator, left_operand = stack[-1], stack[-2]
stack = stack[:-2]
if operator == '+':
num = left_operand + num
stack.append(num)
return stack
def evaluate(expression: str, advance: bool = False) -> tuple:
"""return the result of an expression evaluated with regular or advanced math operator precendece"""
stack = list()
index = 0
while index < len(expression):
data = expression[index]
if data.isdigit():
num = int(data)
if advance:
stack = advanced_op(stack, num, False)
else:
stack = regular_op(stack, num)
elif data in '*+(':
stack.append(data)
elif data == ')':
num = int(stack[-1])
if advance:
stack = stack[:-1]
stack = advanced_op(stack, num, True)
else:
stack = stack[:-2]
stack = regular_op(stack, num)
index += 1
if advance and len(stack) > 1:
stack = advanced_op(stack[:-1], int(stack[-1]), True)
return stack[0]
def part1(entries: dict) -> int:
"""part1 solver"""
result_sum = 0
for expression in entries:
result_sum += evaluate(expression)
return result_sum
def part2(entries: tuple) -> int:
"""part2 solver"""
result_sum = 0
for expression in entries:
result_sum += evaluate(expression, True)
return result_sum
def test_input_day_18():
"""pytest testing function"""
entries = extract(TEST_INPUT)
assert part1(entries) == 26386
assert part2(entries) == 693942
def test_bench_day_18(benchmark):
"""pytest-benchmark function"""
benchmark(main)
def main():
"""main function"""
input_path = str(pathlib.Path(__file__).resolve().parent.parent) + "/inputs/" + str(pathlib.Path(__file__).stem)
start_time = time.time()
input_data = read_input(input_path)
entries = extract(input_data)
print("Part 1: %d" % part1(entries))
print("Part 2: %d" % part2(entries))
end_time = time.time()
print("Execution time: %f" % (end_time-start_time))
if __name__ == "__main__":
main()

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@@ -27,3 +27,4 @@
| [Day 15](https://adventofcode.com/2020/day/15) | [4.463s](./2020-python/solutions/day_15.py) | [718.712ms](./2020-python/solutions/day_15.py) |
| [Day 16](https://adventofcode.com/2020/day/16) | [11.108ms](./2020-python/solutions/day_16.py) | [2.903ms](./2020-python/solutions/day_16.py) |
| [Day 17](https://adventofcode.com/2020/day/17) | [743.804ms](./2020-python/solutions/day_17.py) | [836.255ms](./2020-python/solutions/day_17.py) |
| [Day 18](https://adventofcode.com/2020/day/18) | [10.263ms](./2020-python/solutions/day_18.py) | [2.053ms](./2020-python/solutions/day_18.py) |