Determine if the sum of two integers is equal to the given value

Given an array of integers and a value, determine if there are any two integers in the array whose sum is equal to the given value. Return true if the sum exists and return false if it does not. Consider this array and the target sums: Runtime Complexity: Linear, O(n)O(n) Memory Complexity: Linear, O(n)O(n)

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