Given a set of candidate numbers (C) and a target number (T), find all unique combinations in C where the candidate numbers sums to T.
The same repeated number may be chosen from C unlimited number of times.
Note:
All numbers (including target) will be positive integers.
The solution set must not contain duplicate combinations.
For example, given candidate set [2, 3, 6, 7] and target 7,
A solution set is:
[
[7],
[2, 2, 3]
]
我想好半天也没把递归搞清楚,在网上看了一个比较好的算法,跟着学了一遍,debug跟着递归走一走,感觉拨开迷雾一样。
public List<List<Integer>> combinationSum(int[] candidates,

这篇博客探讨了LeetCode中第39题的解决方案,目标是找到一组候选数字的组合,使它们的和等于目标数。题目强调可以无限次选择相同的数字,并且不允许重复的组合。博主分享了自己通过学习和调试理解递归算法的过程,特别是在解决这个问题时的思考和感悟。
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