Leecode 刷题1 Two Sum

Given nums = [2, 7, 11, 15], target = 9,

Because nums[0] + nums[1] = 2 + 7 = 9,
return [0, 1].

class Solution(object):
    def twoSum(self, nums, target):
        """
        :type nums: List[int]
        :type target: int
        :rtype: List[int]
        """
        n=len(nums)
        for i in range(n-1):
            for j in range(i+1,n):
                if nums[i]+nums[j]==target:
                    return [i,j]