58.最后一个单词的长度  52ms

class Solution:    def lengthOfLastWord(self, s):        """        :type s: str        :rtype: int        """        s = s.split(' ')        while "" in s:            s.remove("")        if not s:            return 0        return len(s[-1])

66.加一 56ms

class Solution:    def plusOne(self, digits):        """        :type digits: List[int]        :rtype: List[int]        """        sum = 0        r = []        for index, i in enumerate(digits):            sum += i*pow(10,len(digits)-index-1)        sum += 1        while sum:            i = 1            r.append(sum % pow(10,i))            sum = sum // pow(10,i)            i += 1        r.reverse()        return r

67.二进制求和 60ms

class Solution:    def addBinary(self, a, b):        """        :type a: str        :type b: str        :rtype: str        """        return (bin(int(a, 2) + int(b, 2))[2:])

69.x的平方根 76ms    击败了81.06% 的用户

class Solution:    def mySqrt(self, x):        """        :type x: int        :rtype: int        """        return int(pow(x, 0.5))

83.删除排序链表重复元素  76ms  击败了48.84% 的用户

# Definition for singly-linked list.# class ListNode:#     def __init__(self, x):#         self.val = x#         self.next = Noneclass Solution:    def deleteDuplicates(self, head):        """        :type head: ListNode        :rtype: ListNode        """        if not head:            return None        cur = head        while cur.next:            if cur.val == cur.next.val:                if cur.next.next:                    t = cur.next.next                    cur.next = t                else:                    cur.next = None            else:                cur = cur.next        return head