Subsets

78. Subsets

Solution

1. For each subsets up to i-1, append nums[i] to the end of it to find subsets up to i.

   def subsets(self, nums):
    """
    :type nums: List[int]
    :rtype: List[List[int]]
    """
    result = [[]]
    for num in nums:
        result += [i + [num] for i in result]
    return result