func_code_string: #include <bits/stdc++.h>   using namespace std;   long long int n, m;   long long int arr[300000];   vector<long long int> ans;   int main() {     ios_base::sync_with_stdio(false);     cin.tie(0);     cout.tie(0);     ;     long long int TESTS, q, a, b, l, r, c, k, p, h, w, x, y, z, xs, ys, t, f;     long double d;     TESTS = 1;     while (TESTS--) {       cin >> n >> p;       long long int maxi = 0;       for (long long int i = 0; i <= n - 1; i++)         cin >> arr[i], maxi = max(maxi, arr[i]);       sort(arr, arr + n);       for (long long int i = 1; i <= maxi; i++) {         long long int num = 1;         x = i;         y = 0;         while (y < n) {           long long int ind = upper_bound(arr, arr + n, x) - arr;           num *= ind - y;           num %= p;           x++;           y++;         }         if (num) ans.push_back(i);       }       cout << ans.size() <<   n ;       for (auto it : ans) cout << it <<    ;     }     return 0;   }   