机试题：进制转换
今日份AC
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.math.BigInteger;
public class Main {
public static void main(String[] args) throws IOException {
// TODO Auto-generated method stub
BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
String str="";
while((str=br.readLine())!=null) {
BigInteger bi=new BigInteger(str);
String ss=bi.toString(2);
System.out.println(ss);
}
}
}