I am not sure this method can be called a cipher since there is probably no way to recover the original number. You should probably call it a hash.
yeah, that's right. Thanks, I changed it to hash and changed some test cases too.
Getting the row and column location from a matrix
Replace all zeros and NaNs in a matrix with the string 'error'
Find the Best Hotels
Find the magnetic field in sollinoid
Cipher or decipher the number according to the second input - 10 keys
Cipher and Decipher the message - same key for all digits
Find the magnetic field around the wire
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