题解 | #截取字符串#

import java.util.*;

// 注意类名必须为 Main, 不要有任何 package xxx 信息
public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        String s = scanner.nextLine();
        int length = s.length();
        if (1 <= length && length <= 1000) {
            int i = scanner.nextInt();
            if (i <= length) {
                System.out.println(s.substring(0, i));
            }

        }
    }
}