Computers and Technology, 16.02.2021 01:00 kthe41261
Q2: Ping-pong The ping-pong sequence counts up starting from 1 and is always either counting up or counting down. At element k, the direction switches if k is a multiple of 8 or contains the digit 8. The first 30 elements of the ping-pong sequence are listed below, with direction swaps marked using brackets at the 8th, 16th, 18th, 24th, and 28th elements: Index 1 2 3 4 5 6 7 [8] 9 10 11 12 13 14 15 [16] 17 [18] 19 20 21 22 23 PingPong Value 1 2 3 4 5 6 7 [8] 7 6 5 4 3 2 1 [0] 1 [2] 1 0 -1 -2 -3 Index (cont.) [24] 25 26 27 [28] 29 30 PingPong Value [-4] -3 -2 -1 [0] -1 -2 Implement a function pingpong that returns the nth element of the ping-pong sequence without using any assignment statements. You may use the function num_eights, which you defined in the previous question. Use recursion - the tests will fail if you use any assignment statements. Hint: If you're stuck, first try implementing pingpong using assignment statements and a while statement. Then, to convert this into a recursive solution, write a helper function that has a parameter for each variable that changes values in the body of the while loop.
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3. bob is arguing that if you use output feedback (ofb) mode twice in a row to encrypt a long message, m, using the same key each time, it will be more secure. explain why bob is wrong, no matter what encryption algorithm he is using for block encryption (15 points).
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How do you share someone else’s tweet with your own twitter followers?
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Q2: Ping-pong The ping-pong sequence counts up starting from 1 and is always either counting up or c...
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