What is going on?

#include <bits/stdc++.h>
using namespace std;

int t,n,k,p,c,w;
vector <int> v;

int main() {
  cin >> t;
  while(t--) {

    cin >> n >> k >> p;
    c = 0;
    v.clear();

    for (int i = 0; i < k; i++) {
      cin >> w;
      v.push_back(w);
    }

    sort(v.begin(),v.end());

    for (int i = 0; i < k; i++) {
      if (v[i]>p) break;
      c++;
    }

    if (p+c > n) cout << -1 << endl; else cout << p+c << endl;

  }
}