Puzzles from adventofcode.com 2015

Day 1: Not Quite Lisp



In [5]:

    
DIRECTIONS = {'(': 1, ')': -1}
def floor_counter(text):
    floor = 0
    for c in text:
        floor += DIRECTIONS.get(c, 0)
    return floor



In [9]:

    
# Test some examples
print(")())()) = {}".format(floor_counter(")())())")))









    



)())()) = -3



In [16]:

    
# Real puzzle
with open('day1/input.txt', 'rt') as fd:
    text = fd.read()
    print("First puzzle solution is {}".format(floor_counter(text)))









    



First puzzle solution is 74



In [17]:

    
def basement_position(text):
    floor = 0
    position = 0
    for c in text:
        position += 1
        floor += DIRECTIONS.get(c, 0)
        if floor == -1:
            return position
    return None



In [18]:

    
# Test some examples
print("()()) = {}".format(basement_position("()())")))









    



()()) = 5



In [19]:

    
# Real puzzle
with open('day1/input.txt', 'rt') as fd:
    text = fd.read()
    print("Second puzzle solution is {}".format(basement_position(text)))









    



Second puzzle solution is 1795