## Problem link:##

**Setter**: Debjit Datta

**Tester**: Debjit Datta

#### Difficulty:##

Cakewalk

#### Prerequisites:##

Modular arithmetic, string

#### Explanation:##

Given a String and an integer with which we need to decrypt the encrypted string, we need to

decrypt the string.

We traverse through the string and for each character, we first find out the index of the

character(i.e distance form ‘a’) and then add n to the index. Then we do modular operation by

26 and then store the decrypted character in the result string.

#### Time complexity:##

**O(m)** where m is the size of string

#### Author’s and Tester’s Solution:##

Author’s solution is here