标签:.so new 数字 正整数 tar path for 递归 目标
给定一个无重复元素的数组 candidates
和一个目标数 target
,找出 candidates
中所有可以使数字和为 target
的组合。
candidates
中的数字可以无限制重复被选取。
说明:
target
)都是正整数。示例 1:
输入: candidates =[2,3,6,7],
target =7
, 所求解集为: [ [7], [2,2,3] ]
示例 2:
输入: candidates = [2,3,5],
target = 8, 所求解集为: [ [2,2,2,2], [2,3,3], [3,5] ]
解题思路:
先排序,然后递归求解
代码如下:
class Solution: def Solver(self, res, path, candidates, target, idx): for i in range(idx, len(candidates)): new_target = target - candidates[i] if new_target < 0: return else: if new_target == 0: res.append(path + [candidates[i]]) else: self.Solver(res, path + [candidates[i]], candidates, new_target, i) def combinationSum(self, candidates, target): """ :type candidates: List[int] :type target: int :rtype: List[List[int]] """ path = [] res = [] candidates = sorted(candidates) self.Solver(res, path, candidates, target, 0) return res
标签:.so new 数字 正整数 tar path for 递归 目标
原文地址:https://www.cnblogs.com/tsdblogs/p/10152867.html