LeetCode 39. Combination Sum

Solution1:
DFS，这个套路要熟记啊！

class Solution {
public:vector<vector<int> > combinationSum(vector<int> &candidates, int target) {vector<vector<int> > res;vector<int> out;sort(candidates.begin(), candidates.end());combinationSumDFS(candidates, target, 0, out, res);return res;}void combinationSumDFS(vector<int> &candidates, int target, int start, vector<int> &out, vector<vector<int> > &res) {if (target < 0) return;else if (target == 0) res.push_back(out);else {for (int i = start; i < candidates.size(); ++i) {out.push_back(candidates[i]);combinationSumDFS(candidates, target - candidates[i], i, out, res);out.pop_back();}}}
};

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【DFS】LeetCode 39. Combination Sum

LeetCode 39. Combination Sum

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