func_code_string: #include <bits/stdc++.h>   using namespace std;   int solve() {     int n;     cin >> n;     if (n == 1)       cout << 1 << endl;     else {       cout << n <<    ;       for (int i = 1; i <= n - 1; ++i) cout << i <<    ;       cout <<   n ;     }     return 0;   }   int main() {     ios_base::sync_with_stdio(false);     cin.tie(NULL);     int t;     t = 1;     while (t-- != 0) solve();     return 0;   }   