add leetcode

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# My LeetCode

## 1. twoSum

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``` python

class Solution:

    def twoSum(self, nums, target):

        for i in range(len(nums)):

            if target - nums[i] in nums:

                return [i, nums.index(target-nums[i])]

# test

if __name__ == '__main__':

    s = Solution()

    print(s.twoSum([2,8,11,7,15],9))

```

%% Output

    [0, 3]

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## 2. addTwoNumbers

以下我的方法是针对 List 而非 ListNode. orz

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``` python

class Solution:

    def addTwoNumbers(self, l1, l2):

        num1 = 0

        for i in range(len(l1)):

            num1 = num1 + l1[i] * 10**(i)

        num2 = 0

        for j in range(len(l2)):

            num2 = num2 + l2[j] * 10**(j)

        nnum = num1+num2

        return [int(x) for x in str(nnum)[::-1]]

if __name__ == '__main__':

    s = Solution()

    print(s.addTwoNumbers([1,2,3],[0,8,4]))

```

%% Output

    [1, 0, 8]

%% Cell type:code id: tags:

``` python

```