source_code: import java.util.*;
  
  public class Main {   
      public static void main(String[] args) {
          Scanner in = new Scanner(System.in);
          long k = in.nextLong();
          long t = 1;
          long l = 1;
          if(k <= 9) {
              System.out.print(k);
              System.exit(0);
          }
          long x = 9;
          while(true) {
              ++l;
              t *= 10;
              x += 9 * l * t;
              if(x >= k) {
                  break;
              }
          }
          if(x == k) {
              System.out.print(9);
              System.exit(0);
          }
          x -= 9 * l * t;
          long a = (k - x) / l;
          if((k - x) % l == 0) {
              x = t + a - 1;
              System.out.print(x % 10);
          } else {
              k -= (x + a * l);
              x = t + a;
              String s = Long.toString(x);
              System.out.print(s.charAt((int)k - 1));
          }
      }
  }