【记录帖】学习python中，刷leetcode，争取保持一天两题

1. 两数之和 https://leetcode-cn.com/problems/two-sum/description/
class Solution:
def twoSum(self, nums, target):
dicts = {}
for k, v in enumerate(nums):
if target - v in dicts:
return [dicts.get(target-v), k]
dicts[v] = k

2. 两数相加 https://leetcode-cn.com/problems/add-two-numbers/description/
# Definition for singly-linked list.
# class ListNode(object):
# def __init__(self, x):
# self.val = x
# self.next = None
class Solution(object):
def addTwoNumbers(self, l1, l2):
"""
:type l1: ListNode
:type l2: ListNode
:rtype: ListNode
"""
a = b = 0
carry = 0
while l1:
a += l1.val * 10 ** carry
carry += 1
l1 = l1.next
carry = 0
while l2:
b += l2.val * 10 ** carry
carry += 1
l2 = l2.next
ret = a + b
h = m = ListNode(0)
if not ret:
return h
while ret:
m.next = ListNode(ret % 10)
ret /= 10
m = m.next
return h.next

卤煮咋不更新了呢？