func_code_string: #include <bits/stdc++.h>   bool f(int x, int n, int *pre, int p) {     for (int j = 0; j < n; ++j) {       if ((pre[j + x] - j) % p == 0) return false;     }     return true;   }   using namespace std;   int main(int argc, char **argv) {     vector<int> ans;     int t, n, p, a[2000], pre[5001] = {0};     cin >> n >> p;     for (int i = 0; i < n; ++i) cin >> a[i];     sort(a, a + n);     int mn = a[0], mx = a[n - 1];     t = 0;     for (int i = 1; i <= 5000; ++i) {       pre[i] = pre[i - 1];       while (t < n && a[t] <= i) ++t, ++pre[i];     }     for (int i = mn; i <= 2000; ++i) {       if (f(i, n, pre, p)) ans.push_back(i);     }     cout << ans.size() << endl;     for (int i = 0; i < ans.size(); ++i) {       cout << ans[i] << (i == ans.size() - 1 ?   n  :    );     }     return 0;   }   