Amitava, it is fantastic that you are contributing problems, but you really need to spend more time specifying what the solution should do. The person solving is left needing to guess too much.
Definitely Agree with the cyclist. W/o example it is impossible to understand the task to achieve.
The DC component of a signal is usually its mean. Now filter can have many meanings, but in this case, it means to remove the signal variation.
Find the numeric mean of the prime numbers in a matrix.
Return the largest number that is adjacent to a zero
Which doors are open?
sum of first 'n' terms
Do you like your boss?
Compress strings (not springs)
Looking for Squares
Dancing with wolves?
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