题解 | 截取字符串
import java.util.Scanner;
// 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);
while(scanner.hasNext()) {
String str = scanner.nextLine();
int length = scanner.nextInt();
System.out.println(str.substring(0,length));
}
}
}
