D. Bottle Time error

#include<fstream>
#include <vector>
#include <iostream>
#include <algorithm>
using namespace std;

//vector <int> vec{3,6,5,3,6};
vector <int> vec;


int result = 0;
int counter = 0, tempCounter =0;
int previousValue = 0;
int KnapSack(int currentPos, int currentCapacity)
{
    int localCounter =0;
  if(currentCapacity ==0)
  {
   // cout << "current cap return" << endl;
      counter = tempCounter;
     // localCounter = counter;
     // cout << "Local counter: " << endl;
      return counter;
      exit(2);

  }
  if(currentPos>=vec.size())
  {
      //cout << "current pos return" << endl;
      return 0;
  }
  int currentValue = vec.at(currentPos);
  if(currentValue<=currentCapacity)
  {
      currentCapacity = currentCapacity-currentValue;
      currentPos++;
      tempCounter++;
      previousValue = currentValue;
      KnapSack(currentPos,currentCapacity);
  }
  if(currentValue>currentCapacity)
  {
      currentCapacity = currentCapacity + previousValue;
      --tempCounter;
      KnapSack(currentPos,currentCapacity);
  }
 return 0;
}
void printVec()
{
    cout <<"VEc size: " << vec.size() << endl;
    for(int i =0; i<vec.size();i++)
    {
        cout << vec.at(i) << " \t ";
    }
    cout << endl;
}
int main(){

    int W =0, n =0;
    int x =0;
    int broiTestove =0;
    cin>>broiTestove;
    while(broiTestove--)
    {
        cin>>W;
        cin>>n;
        for(int i =0; i< n; i++)
        {
            cin >> x;
            vec.push_back(x);
        }
        sort(vec.begin(), vec.end());
     //   printVec();
        int ans = KnapSack(0, W);
        cout << counter << endl;
        vec.clear();
        previousValue =0;
        tempCounter =0;
        counter =0;
    }

    //cout << vec.size() << endl;

}