func_code_string: #include <bits/stdc++.h>   using namespace std;   int n, ans[100], len, a, cur;   int main() {     cur = 1;     cin >> n;     for (int i = 0; i < (n); ++i) {       cin >> a;       if (a == cur) {         ans[len++] = 2001 + i;         cur++;       }     }     cout << len << endl;     for (int i = 0; i < (len); ++i) cout << ans[i] <<    ;     return 0;   }   