Description
In cryptography, a Caesar cipher, also known the shift cipher or Caesar shift, is one of the simplest encryption techniques.
In Caesar cipher each letter in the plaintext is replaced by a letter some fixed number of positions down the alphabet. For example, with a left shift of 3, D would be replaced by A, E would become B, and so on.
(Excerpted from wiki: https://en.wikipedia.org/wiki/Caesar_cipher)
Given one integer S to represent the left shift amount, and a string CT to represent the ciphered-text. Please Write a C Program to print out the origin plaintext.
Input
One integer S (left shift amount) and a string CT (ciphered-text).
Note that:
- -32,768 <= S <= 32,767.
- CT contains only lowercase English letters.
- The length of CT <= 2000.
Output
Output should follow below format:
PT
Note that:
- Need to have a return value('\n') at the end of your string.