comefrom: <qiyuangong>032_Longest_Valid_Parentheses_1.py
code: def longestValidParentheses( s):
      ls = len(s)
      start = [0] * (ls + 1)
      all = [0] * (ls + 1)
      for i in reversed(range(ls - 1)):
          if s[i] == '(':
              if s[i + 1] == ')':
                  start[i] = 2
              if start[i + 1] + i + 1 < ls and s[start[i + 1] + i + 1] == ')':
                  start[i] = 2 + start[i + 1]
              if start[start[i] + i] > 0:
                  start[i] += start[start[i] + i]
          all[i] = max(start[i], all[i + 1])
      return all[0]
masked: def sample_funcname ( var_0 ) :
      var_2 = len ( var_0 )
      var_5 = [ 0 ] * ( var_2 + 1 )
      var_6 = [ 0 ] * ( var_2 + 1 )
      for var_9 in reversed ( range ( var_2 - 1 ) ) :
          if var_0 [ var_9 ] == '(' :
              if var_0 [ var_9 + 1 ] == ')' :
                  var_5 [ var_9 ] = 2
              if var_5 [ var_9 + 1 ] + var_9 + 1 < var_2 and var_0 [ var_5 [ var_9 + 1 ] + var_9 + 1 ] == ')' :
                  var_5 [ var_9 ] = 2 + var_5 [ var_9 + 1 ]
              if var_5 [ var_5 [ var_9 ] + var_9 ] > 0 :
                  var_5 [ var_9 ] += var_5 [ var_5 [ var_9 ] + var_9 ]
          var_6 [ var_9 ] = max ( var_5 [ var_9 ] , var_6 [ var_9 + 1 ] )
      return var_6 [ 0 ]
  