题解 | #字符串反转#

public class Main{
    public static void main(String []args) throws IOException{
        BufferedReader in=new BufferedReader(new InputStreamReader(System.in));
        String line=in.readLine();
        if(line.length()>1000){
            return;
        }
        StringBuilder lineBuilder=new StringBuilder(line);
        lineBuilder.reverse();
        System.out.print(lineBuilder);
    }
}