Can anyone help me with this?

[gabsacr]

The code Below works just fine.. it will print all combinations from number 1 to 25, in and array of 15 numbers.
The thing is, I need to make it print only the combinations which the sum of all the elements divided by 15 is between 13 and 14. Can anyone help?

#include <iostream>
#include <vector>

using namespace std;

vector<int> people;
vector<int> combination;

void pretty_print(const vector<int>& v) {	
  static int count = 0;
  cout << "combination no " << (++count) << ": [ ";
  for (int i = 0; i < v.size(); ++i) { cout << v[i] << " "; }
  cout << "] " << endl;
}

void go(int offset, int k) {
  if (k == 0) {
    pretty_print(combination);
    return;
  }
  for (int i = offset; i <= people.size() - k; ++i) {
    combination.push_back(people[i]);
    go(i+1, k-1);
    combination.pop_back();
  }
}

int main() {
  int n = 4, k = 3;
    
  for (int i = 0; i < n; ++i) { people.push_back(i+1); }
  
  go(0, k);

  return 0;

[MiiNiPaa]

Add another check before calling pretty_print. Something like:

if (k == 0) {
    double sum = std::accumulate(combination.begin(), combination.end(), 0)  / 15.0;
    if(sum >= 13 && sum <= 14 )
        pretty_print(combination);
    return;
}

[gabsacr]

thanks!