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32 lines (29 loc) · 897 Bytes
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CombinationSum.cpp
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32 lines (29 loc) · 897 Bytes
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class Solution {
public:
vector<vector<int>> combinationSum(vector<int>& candidates, int target) {
vector<vector<int>> res;
sort(candidates.begin(), candidates.end());
vector<int> cur;
FindCombination(candidates, 0, target, cur, res);
return res;
}
void FindCombination(vector<int> candidates, int start, int target, vector<int> cur, vector<vector<int>> &res)
{
if (target == 0)
{
res.push_back(cur);
}
else if (target < 0 || start >= candidates.size())
{
return;
}
for (int i = start; i < candidates.size(); i++)
{
if (target - candidates[i] < 0)
break;
cur.push_back(candidates[i]);
FindCombination(candidates, i, target - candidates[i], cur, res);
cur.pop_back();
}
}
};