func_code_string: #include <bits/stdc++.h>   using namespace std;   const int dx[] = {1, 0, -1, 0};   const int dy[] = {0, -1, 0, 1};   const double EPS = 1e-9;   const int days[] = {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};   const int daysleap[] = {31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};   int main() {     int n, k;     cin >> n >> k;     vector<int> A(n);     for (unsigned int i = 0; i < (n); i++) cin >> A[i];     sort(A.begin(), A.end());     vector<int> B = A;     unique(B.begin(), B.end());     reverse(B.begin(), B.end());     vector<int> C = B;     for (unsigned int i = 0; i < (B.size()); i++) {       C[i] = count(A.begin(), A.end(), B[i]);     }     int kk = 0;     for (unsigned int i = 0; i < (B.size()); i++) {       kk += C[i];       if (kk == k) {         cout << B[i] <<     << B[i] << endl;         return 0;       }     }     cout << -1 << endl;     return 0;   }   