题解 | #截取字符串#

import java.util.Scanner;

public class Main {
    public static String subString(String str, int n) {


        return str.substring(0, n);
    }

    public static void main(String agrs[]) {
        Scanner sc = new Scanner(System.in);
        String line = sc.nextLine();
        int n = sc.nextInt();

        System.out.println(Main.subString(line, n));

    }
}