HackerRank içerisinde bulunan “Caesar Cipher” sorusunun açıklaması ve çözümü. Soruda size verilen string’i sezar şifrelemesi ile, harflerini alfabedeki sıralarını verilen sayı kadar ötelemeniz isteniyor.

► HackerRank – Caesar Cipher: https://www.hackerrank.com/challenges/caesar-cipher-1/problem

► Problem açıklaması:

Julius Caesar protected his confidential information by encrypting it using a cipher. Caesar’s cipher (https://en.wikipedia.org/wiki/Caesar_cipher) shifts each letter by a number of letters. If the shift takes you past the end of the alphabet, just rotate back to the front of the alphabet. In the case of a rotation by 3, w, x, y and z would map to z, a, b and c.

Original alphabet: abcdefghijklmnopqrstuvwxyz

Alphabet rotated +3: defghijklmnopqrstuvwxyzabc

Sample Input

11

middle-Outz

2

Sample Output

okffng-Qwvb

Explanation

Original alphabet: abcdefghijklmnopqrstuvwxyz

Alphabet rotated +2: cdefghijklmnopqrstuvwxyzab

m — o

i — k

d — f

d — f

l — n

e — g

– –

O — Q

u — w

t — v

z — b