g The bank from home work 5 recently hired a new developer. They are a C programer who hates python and wanted to rewrite the entire codebase. But they only succeeded in rewriting some of the code. Specifically, bankRecieveDeposit is now written in C and the deposit object is no longer a pickled python object. Instead it's a null terminated string of the form source;dest;amount. The encryption/decryption algorithms have not changed. I. e. it is still encrypted by XORing in a key stream derived using public key cryptography. The new programmer has the code running on a web server. Now anyone can submit deposits over the internet. The server will not respond with the contents of a submitted deposit. In fact, it seems it won't actually do anything at all with the deposit after decrypting it. But for some reason, for any submitted deposit, the server will respond with the result of strlen(PKDec(bankSK, CT)). I. e. the length of the decrypted string containing the deposit. How can you use this to learn the contents of an encrypted deposit

Ihave a music player on my phone. i can buy songs, add them to playlists and play them. obviously it would be redundant to store each song in each playlist; each playlist is just a list of pointers to the songs. for this lab you will simulate this behavior. your program will need to have options to: add songs to the system library (you will store the text of the first line of the song, rather than the audio) add playlists add songs to a playlist list playlists play a playlist list all of the songs in the library with a count of how many times each song has been played remove a song from a playlist remove a playlist remove a song from the library (and thus from all playlists that contain it) note that we will not be checking many error cases. in real programming this would be bad, you should usually try to recognize and respond to as many types of errors as you can. in the context of class we are trying to acquaint you with as many concepts as possible, so for the sake of educational efficiency we will not be checking most errors in this lab, you may assume that your user provides correct input. you may add all appropriate error testing if you wish, but we will not be testing for it.

Write a function balancechemical to balance chemical reactions by solving a linear set of equations. the inputs arguments are: reagents: symbols of reagents in string row array products: symbols of products in string row array elements: elements in the reaction in string row array elcmpreag: elemental composition of reactants in two dimensional numeric array elcmpprdcts: elemental composition of prducts in two dimensional numeric array hint: the first part of the problem is setting up the set of linear equations that should be solve. the second part of the problem is to find the integers from the solution. one way to do this is to mulitiply the rational basis for the nullspace by increasing larger integers until both the left-and right-side integers exist. for example, for the reaction that involves reacting with to produce and : reagents=["ch4", "o2"]; products =["co2", "h2o"]; elements =["c","h", "o"] elcmpreag=[1,4,0;

Selling a product through an electronic medium is