parameters: (self, n)
return_statement: return b
docstring: :type n: int
          :rtype: int
docstring_summary: :type n: int
          :rtype: int
docstring_tokens: : type n : int : rtype : int
function: def climbStairs(self, n):
          """
          :type n: int
          :rtype: int
          """
          a = 1
          b = 1
          for i in range(2, n + 1):
              a, b = b, a + b
      
          return b
function_tokens: def climbStairs ( self , n ) : a = 1 b = 1 for i in range ( 2 , n + 1 ) : a , b = b , a + b return b