func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int n;     cin >> n;     string s =   ;     int r = 1;     while (s.size() < 1050) {       int k = r;       string t =   ;       while (k > 0) {         t = char((k % 10) +  0 ) + t;         k = k / 10;       }       s = s + t, r++;     }     cout << s[n - 1];     return 0;   }   