Find the missing number in the array in python

You are given an array of positive numbers from 1 to n, such that all numbers from 1 to n are present except one number x. You have to find x. The input array is not sorted. Look at the below array and give it a try before checking the solution. Runtime Complexity: Linear, O(n)O(n) Memory Complexity: Constant, O(1)O(1)

Caesar Cipher problem in python

A Caesar cipher is a simple substitution cipher in which each letter of the plain text is substituted with a letter found by moving n places down the alphabet. For example, assume the input plain text is the following: If the shift value, n, is 4, then the encrypted text would be the following: You are to write … Read more