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 two-word state names
Distance walked 1D
random picture with random colours
Check if number exists in vector
Do Fast Fourier Transformation
letter yes yes & letter no no
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