//https://atcoder.jp/contests/abc106/tasks/abc106_c

import java.io.*;

class Main{
    public static void main(String[] args) throws IOException{
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        String S = br.readLine();
        String str = br.readLine();
        long K = Long.parseLong(str);
        String ans = "0";
        for (int i=0;i<K;i++){
            if (!String.valueOf(S.charAt(i)).equals("1")){
                ans = String.valueOf(S.charAt(i));
                break;
            }
        }
        if (ans.equals("0")){
            ans = "1";
        }
        System.out.println(ans);
    }
}
/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz