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/**
* ### Õæ難µÄ題Ä¿: ¹·Æ¨ÑÝËã·¨ (測資ºÜ機車)
* 測驗結¹û: x.xx0 ms
* 測驗ÈÕÆÚ: 200y-mm-dd
* @author Raymond Wu (Сè°Íè)
*/
public class Main {
 
  // 輸Èë緩衝區 (緩衝¿Õ間ÐèÒªÒÀÕÕ題Ä¿調Õû)
  public static byte[] cinbuf = new byte[1024];
 
  // 讀ȡһ個單×Ö (Ó¢ÎÄÐÕÃû°üº¬¿Õ°×時請²»ÒªÓÃ)
  public static String readToken() {
    int offset = 0;
    int bytedata = -1;
    
    try {
      // ÂÔ過·Ç單×ÖµÄ×ÖÔª '\t','\n','\r',' '
      bytedata = System.in.read();
      while(bytedata==9||bytedata==10||bytedata==13||bytedata==32) {
        bytedata = System.in.read();
      }
 
      // 載Èë單×ÖµÄ×ÖÔª
      while(bytedata!=-1) {
        if(bytedata==9||bytedata==10||bytedata==13||bytedata==32) {
          break;
        } else {
          cinbuf[offset++] = (byte)bytedata;
        }
        bytedata = System.in.read();
      }
    } catch(Exception e) {}
    
    if(offset+bytedata==-1) return null; // ´®Á÷結Êø
    return new String(cinbuf,0,offset);
  }
  
  // 讀ȡһÐÐ
  public static String rea


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