add problem

Author: AldythNahak

Easy/valid_parentheses.py

@@ -4,6 +4,10 @@ def isValid(self, s):
  :type s: str
  :rtype: bool
  """
+ 
+ if len(s)%2 != 0 or len(s) > 10000:
+ return False
+ 
  mapParentheses = {"(": ")","[": "]", "{": "}"}
  collectParentheses = []
 

Medium/zigzag_conversion.py

@@ -0,0 +1,32 @@
+class Solution(object):
+ def convert(self, s, numRows):
+ """
+ :type s: str
+ :type numRows: int
+ :rtype: str
+ """
+ mapLetter = [[] for _ in range(numRows)]
+ # strReverse = list(s)[::-1]
+ # print(strReverse)
+ start = 0
+ iLetter = 0
+ 
+ for i, _ in enumerate(mapLetter):
+ if iLetter > len(s):
+ break
+ 
+ if start == 0:
+ mapLetter[i].append(s[iLetter])
+ 
+ iLetter += 1
+ 
+ if start < numRows:
+ start = 0
+ else:
+ start += 1
+ 
+ print(mapLetter)
+ 
+ 
+print(Solution().convert("PAYPALISHIRING", 3))
+