题解 | #截取字符串#

import java.util.*;
public class Main{
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        while(sc.hasNext()) {
            String s = sc.next();
            int k = sc.nextInt();
            System.out.println(s.substring(0,k));
        }
        sc.close();
    }
}