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uber.cpp
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uber.cpp
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// [9, -9, 5, 4, 0] 0
/*[
[9.-9]
[9, -9, 0]
9 -9 5
9, {-9,5} 0 {-9,5}
0, {5} 9{5} -9 {5} 0 {5}
*/
#include <iostream>
#include <vector>
#include <iterator>
using namespace std;
// To execute C++, please define "int main()"
class Solution {
public:
Solution() {};
~Solution() {};
vector< vector <int> > resultSet;
void findSubSetHelper( const vector<int> & v, int sum, int index, vector<int> output) {
//Base Case
if (index > v.size()) {
return;
}
if (sum == 0 && !output.empty() && index == v.size()) {
//Add the output vector to results
resultSet.push_back(output);
return;
}
findSubSetHelper(v, sum, index+1, output);
output.push_back(v[index]);
findSubSetHelper(v, sum - v[index], index+1, output);
return;
}
void findSubSet( const vector<int> & v, int sum) {
vector<int> output;
findSubSetHelper(v,sum, 0, output);
}
};
void findSubSetByBits(const vector<int> & v, int K){
int N = v.size();
std::vector< std::vector<int> > resultSet;
for (int i = 0; i < (1<<N); ++i) {
std::vector<int> output;
int sum = 0;
for (int j = 0; j < N; ++j) {
if (i & (1<<j)){
sum += v[j];
output.push_back(v[j]);
}
}
if (sum == K) {
//copy(output.begin(),output.end(), ostream_iterator<int>(cout," ")); cout<<endl;
resultSet.push_back(output);
}
}
for (int i = 0; i < resultSet.size(); ++i) {
vector<int> result = resultSet[i];
copy(result.begin(), result.end(), ostream_iterator<int>(cout, " "));cout<<endl;
}
}
int main() {
vector<int> v = { 9, -9, 5, 4, 0};
Solution s;
int sum = 0;
s.findSubSet(v, 0);
for (int i = 0; i < s.resultSet.size(); ++i) {
vector<int> result = s.resultSet[i];
copy(result.begin(), result.end(), ostream_iterator<int>(cout, " "));cout<<endl;
}
cout << "*********" <<endl;
findSubSetByBits(v,0);
return 0;
}