output_description: Print the number of days from 2018-1-1 through 2018-a-b that are Takahashi.
  
  * * *
input_description: Input is given from Standard Input in the following format:
  
      
      
      a b
attempt: import math
  import string
  import collections
  from collections import Counter
  from collections import deque
  
  
  def readints():
      return list(map(int, input().split()))
  
  
  def nCr(n, r):
      return math.factorial(n) // (math.factorial(n - r) * math.factorial(r))
  
  
  def has_duplicates2(seq):
      seen = []
      for item in seq:
          if not (item in seen):
              seen.append(item)
      return len(seq) != len(seen)
  
  
  def divisor(n):
      divisor = []
      for i in range(1, n + 1):
          if n % i == 0:
              divisor.append(i)
      return divisor
  
  
  # coordinates
  dx = [-1, -1, -1, 0, 0, 1, 1, 1]
  dy = [-1, 0, 1, -1, 1, -1, 0, 1]
  
  H, W = map(int, input().split())
  s = [None] * H
  for i in range(H):
      s[i] = input()
  d = deque()
  d.append((0, 0))
  while len(d) != 0:
      g, r = d.popleft()
      if s[g][r] == "#":
          if g != 0 and s[g - 1][r] == "#":
              d.append((g - 1, r))
          else:
              print("No")
              break
          if g != H - 1 and s[g + 1][r] == "#":
              d.append((g + 1, r))
          else:
              print("No")
              break
          if r != 0 and s[g][r - 1] == "#":
              d.append((g, r - 1))
          else:
              print("No")
              break
          if r != W - 1 and s[g][r + 1] == "#":
              d.append((g, r + 1))
          else:
              print("No")
              break
      print("Yes")
  
problem_description: Statement
  
  In AtCoder Kingdom, Gregorian calendar is used, and dates are written in the
  "year-month-day" order, or the "month-day" order without the year.  
  For example, May 3, 2018 is written as 2018-5-3, or 5-3 without the year.
  
  In this country, a date is called _Takahashi_ when the month and the day are
  equal as numbers. For example, 5-5 is Takahashi.  
  How many days from 2018-1-1 through 2018-a-b are Takahashi?
samples: [{"input": "5 5", "output": "5\n    \n\nThere are five days that are Takahashi: 1-1, 2-2, 3-3, 4-4 and 5-5.\n\n* * *"}, {"input": "2 1", "output": "1\n    \n\nThere is only one day that is Takahashi: 1-1.\n\n* * *"}, {"input": "11 30", "output": "11\n    \n\nThere are eleven days that are Takahashi: 1-1, 2-2, 3-3, 4-4, 5-5, 6-6, 7-7,\n8-8, 9-9, 10-10 and 11-11."}]