ChongyeWang

class Solution(object):
    def permute(self, nums):
        """
        :type nums: List[int]
        :rtype: List[List[int]]
        """
        result = []
        temp = []
        self.backtracking(result, temp, nums)
        return result

ChongyeWang

class Solution(object):
class Solution(object):
    def combinationSum(self, candidates, target):
        """
        :type candidates: List[int]
        :type target: int
        :rtype: List[List[int]]
        """
        res = []
        temp = []

ChongyeWang

class Solution(object):
    def combinationSum2(self, candidates, target):
        """
        :type candidates: List[int]
        :type target: int
        :rtype: List[List[int]]
        """
        candidates = sorted(candidates)
        result = []
        temp = []