func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     std::ios_base::sync_with_stdio(false);     long long k, n, m, x = 10;     int i = 1;     cin >> k;     k -= 9;     if (k <= 0) {       k = k + 9;       cout << k;       exit(0);     }     while (++i) {       k -= 9 * i * x;       if (k <= 0) {         k += 9 * i * x;         n = k / i;         m = k % i;         n = x + n;         if (m == 0) n -= 1;         ostringstream s;         s << n;         string s1 = s.str();         if (m == 0)           cout << s1[i - 1];         else           cout << s1[m - 1];         exit(0);       }       x = x * 10;     }   }   