func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int n;     cin >> n;     int a[3000];     int ert = 0, at = 0, as = 0;     int k = 1;     while (k < 3000) {       ert++;       if (ert % 10 == 0) at++;       if (ert % 10 == 0 and at % 10 == 0) as++;       if (k <= 9) {         a[k] = ert % 10;         k++;       } else {         if (k > 9 and k < 190) {           a[k] = at % 10;           k++;           a[k] = ert % 10;           k++;         } else {           a[k] = as % 10;           k++;           a[k] = at % 10;           k++;           a[k] = ert % 10;           k++;         }       }     }     cout << a[n];   }   