#!/usr/bin/env python
# coding: utf-8

# In[1]:


def count_parenthesis(s):
    c = 0
    for e in s:
        if e == '(':
            c += 1
        if e == ')':
            c -= 1
    return c

def floor_position(s, f):
    c = 0
    i = 0
    for e in s:
        if e == '(':
            c += 1
            i += 1
        if e == ')':
            c -= 1
            i += 1
        if c == f:
            break
    if c != f:
        raise Exception('Floor not reached')
    return i


# In[2]:


assert count_parenthesis('(())') == 0
assert count_parenthesis('()()') == 0
assert count_parenthesis('(((') == 3
assert count_parenthesis('))(((((') == 3
assert count_parenthesis('())') == -1
assert count_parenthesis(')())())') == -3


# In[3]:


import import_ipynb
import helper
s = helper.read_file("2015_1.txt")


# In[4]:


count_parenthesis(s)


# In[5]:


assert floor_position(')', -1) == 1
assert floor_position('()())', -1) == 5


# In[6]:


floor_position(s, -1)


# In[ ]: