Day 18 questions updated

Day 18/Problem Statement 18.txt

@@ -0,0 +1,29 @@
+A number of balls are kept in a basket each named in the range [1,n]. some students picked few balls randomly and changed their numbers to existing numbers in the box and then added back. Now box has unique numbers + duplicate numbers. Find the original numbers on the balls whose numbers were changed.
+
+Input variables:-
+   int t: no. of test cases
+   int n: range 
+   int arr[]: array conatining the original and duplicate numbered balls
+
+Input Description:
+-First line of input consists of t, the number of test cases
+-Next each lines consist of n the range 
+-Next line consist of the array conatining the original and duplicate numbered balls
+
+Output Description:-
+   Print the balls whose numbers were changed
+
+Constraints:-
+ -> 1<=t,n<=10
+ ->1<= value of each array element <=10
+
+ Sample Input:
+2
+4
+[4,3,2,7,8,2,3,1]
+2
+[1,1]
+
+Sample Output:
+5,6
+2