leetcode_day1

    class Solution(object):
        def twoSum(self, nums, target):
            """
            :type nums: List[int]
            :type target: int
            :rtype: List[int]
            """
            dict_buff = {}
            for i in xrange(len(nums))
                x = num[i]
                if (target - x) in dict_buff:
                    return [dict_buff[target - x], i]
                dict_buff[x] = i