source_code: import java.util.Scanner;
  
  public class A1177 {
      public static long exponential(long a, long b){
          long result = 1;
          for(int i=0;i<b;i++){
              result *= a;
          }
          return result;
      }
      public static void main(String args[]){
          Scanner scanner = new Scanner(System.in);
          long  k = scanner.nextLong();
          //int k =21;
          long sum = 0;
          long i=1;
          while(true){
              long interval = 9 * exponential(10,i-1) * i;
              if(sum + interval >= k){
                  break;
              } else {
                  i++;
                  sum += interval;
              }
          }
          long t = k-sum;
          long targetNumber = exponential(10, i-1) + (t-1)/i;
          String s = "" + targetNumber;
          int hedef = (int)((t-1)%i);
          System.out.println(s.charAt(hedef));
      }
  }
  