func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     ios_base::sync_with_stdio(false);     cin.tie(NULL);     int n, k;     cin >> n >> k;     int a[n];     for (int i = 0; i < n; i++) cin >> a[i];     if (n > 1) sort(a, a + n);     int cont = 0;     if (k == n) {       cout << a[k - 1] <<   n ;     } else if (k == 0) {       if (a[0] - 1 >= 1)         cout << a[0] - 1 << endl;       else         puts( -1 );     } else {       k--;       if (a[k] == a[k + 1])         cout << -1 << endl;       else         cout << a[k] << endl;     }   }   