Java的快读快写
import java.io.*;
class Main
{
public static void main(String[] args) throws IOException
{
StreamTokenizer in = new StreamTokenizer(new BufferedReader(new InputStreamReader(System.in)));
PrintWriter out = new PrintWriter(new OutputStreamWriter(System.out));
in.nextToken();
int n = (int)in.nval;
out.println(n);
out.flush(); //刷新缓冲区,别忘记写这句
}
}