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Copy pathSubsets.cpp
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52 lines (49 loc) · 1.03 KB
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Copy pathSubsets.cpp
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52 lines (49 loc) · 1.03 KB
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#include<iostream>
#include<vector>
using namespace std;
void cur(vector<vector<int> >& re,vector<int>& cur_re,vector<int> nums,int left,int ss)
{
if (left==0)
{
re.push_back(cur_re);
return;
}
for (int i=ss;i<=nums.size()-left;i++)
{
cur_re.push_back(nums[i]);
cur(re,cur_re,nums,left-1,i+1);
cur_re.pop_back();
while (nums[i]==nums[i+1]) {i++;}
}
}
vector<vector<int> > subsets(vector<int>& nums)
{
vector<int> cur_re;
vector<vector<int> > re;
re.push_back(cur_re);
if (nums.size()==0)
return re;
for (int i=0;i<nums.size();i++)
{
cur(re,cur_re,nums,i+1,0);
}
return re;
}
int main()
{
vector<vector<int> > re;
vector<int> cur_re;
vector<int> num;
num.push_back(1);
num.push_back(1);
num.push_back(2);
num.push_back(2);
re=subsets(num);
for (int i=0;i<re.size();i++)
{
for (int j=0;j<re[i].size();j++)
cout<<re[i][j]<<" ";
cout<<endl;
}
return 0;
}