Create Valid Palindrome II.py

Author: sugia

Valid Palindrome II.py

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+'''
+ Given a non-empty string s, you may delete at most one character. Judge whether you can make it a palindrome.
+
+Example 1:
+
+Input: "aba"
+Output: True
+
+Example 2:
+
+Input: "abca"
+Output: True
+Explanation: You could delete the character 'c'.
+
+Note:
+
+    The string will only contain lowercase characters a-z. The maximum length of the string is 50000.
+
+'''
+
+class Solution(object):
+    def validPalindrome(self, s):
+        """
+        :type s: str
+        :rtype: bool
+        """
+        vec = list(s)
+        
+        left = 0
+        right = len(vec) - 1
+        while left < right:
+            if s[left] != s[right]:
+                return self.valid(s[left:right]) or self.valid(s[left+1:right+1])
+            left += 1
+            right -= 1
+            
+        return True
+    
+    def valid(self, vec):
+        n = len(vec)
+        for i in xrange(n // 2):
+            if vec[i] != vec[n-i-1]:
+                return False
+        return True