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  1. /* package whatever; // don't place package name! */
  2.  
  3. import java.util.*;
  4. import java.lang.*;
  5. import java.io.*;
  6.  
  7. /* Name of the class has to be "Main" only if the class is public. */
  8. class Ideone
  9. {
  10.  
  11.     public static void main (String[] args) throws java.lang.Exception
  12.     {
  13.         int rtn = openedRoomNo(5);
  14.         System.out.println("return value is : " + rtn);
  15.     }
  16.  
  17.  
  18.     static int openedRoomNo(int rooms) {
  19.         int rtnVal = 0;
  20.         //set default arr
  21.         int[][] roomsArr = new int[rooms][2];
  22.         int cnt = 0;
  23.         for(int[] room : roomsArr) {
  24.             System.out.println("room0 is : " + room[0]);
  25.  
  26.             room[0] = ++cnt;
  27.             room[1] = 1;
  28.         }
  29.         rtnVal = loopAtAddedCount(2, roomsArr);
  30.         return rtnVal;
  31.     }
  32.  
  33.     static int loopAtAddedCount (int divNo, int[][] rooms) {
  34.         int loopCnt = 0;
  35.  
  36.         if(divNo == rooms.length) {
  37.             for(int[] room : rooms) {
  38.                 if(room[1] == 1) {
  39.                     loopCnt ++;
  40.                 }
  41.             }
  42.             return loopCnt;
  43.         }
  44.  
  45.  
  46.         for(int [] room : rooms) {
  47.            if(divNo % room[0]  == 0) {
  48.                if(room[1] == 0) {
  49.                    room[1] = 1;
  50.                }else {
  51.                    room[1] = 0;
  52.                }
  53.            }
  54.         }
  55.         divNo +=1;
  56.         return loopAtAddedCount(divNo , rooms);
  57.     }
  58. }
Success #stdin #stdout 0.08s 33976KB
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stdin
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Standard input is empty
stdout
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room0 is : 0
room0 is : 0
room0 is : 0
room0 is : 0
room0 is : 0
return value is : 2
https://ideone.com/rn1nri
language:
Java (HotSpot 12)
created:
4 years ago
visibility:
public

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