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package floatt;
public class Go {
 public static int i = 0;
 public static void main(String[] args){
  calc("", 5);
  System.out.println("×ܹ²ÓÐ"+i+"ÖÖ×ß·¨~");
 }
 
 //ÉÏÂ¥ÌÝÿ´ÎÖ»ÐèÒ»²½»òÕßÁ½²½£¬ÓжàÉÙ×ß·¨
 public static void calc(String log, int num){
  if (num == 0) {
   i++;
   System.out.println(log.substring(0,log.length()-1));
   return;
  }else if(num == 1) {
   i++;
   System.out.println(log+"1");
   return;
  }
  calc(log+"1,", num - 1);
  calc(log+"2,", num - 2);
 }
}


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