Question

Question
You have to find the security key from the data transmitted.
Input
The input consists of an integer data, representing the data to be transmitted.
Output
Print an integer representing the security key for the given data.
Example
Input
578378923
Output
783
Explanation
The repeated digits in the data are 7,8 and 3. So, the security key is 783​

Answer 1

Answer:

I don't know about this question