func_code_string: #include <bits/stdc++.h>   using namespace std;   int n, k, c[1001], i, x, a, b;   int main() {     cin >> n >> k;     for (int x, i = 1; i <= n; ++i) {       cin >> x;       c[x]++;     }     for (i = 1; i <= k; ++i) {       a = a + c[i] / 2 * 2;       b = b + c[i] % 2;     }     cout << a + (b + 1) / 2;   }   