Problem:
Score : 200 points

Problem Statement

We have a string S consisting of uppercase English letters. Additionally, an integer N will be given.

Shift each character of S by N in alphabetical order (see below), and print the resulting string.

We assume that A follows Z. For example, shifting A by 2 results in C (A \to B \to C), and shifting Y by 3 results in B (Y \to Z \to A \to B).

Constraints

0 \leq N \leq 26

1 \leq |S| \leq 10^4

S consists of uppercase English letters.

Input

Input is given from Standard Input in the following format:

N
S

Output

Print the string resulting from shifting each character of S by N in alphabetical order.

Sample Input 1

2
ABCXYZ

Sample Output 1

CDEZAB

Note that A follows Z.

Sample Input 2

0
ABCXYZ

Sample Output 2

ABCXYZ

Sample Input 3

13
ABCDEFGHIJKLMNOPQRSTUVWXYZ

Sample Output 3

NOPQRSTUVWXYZABCDEFGHIJKLM

Solution in C# (Mono 4.6.2.0) (judge verdict: Wrong Answer)

using System;
using System.Collections.Generic;
using System.Text;

public class Program
{
  private static void Main()
  {
   	int n = int.Parse(Console.ReadLine());
    byte[] str = Encoding.ASCII.GetBytes(Console.ReadLine());
    
    for(int i = 0; i < str.Length; i++)
    {
      if(str[i] + n > Encoding.ASCII.GetBytes("Z")[0])
      {
      	str[i] = (byte)(str[i] + n - Encoding.ASCII.GetBytes("Z")[0]);
      }
      else
        str[i] = (byte)(str[i] + n);
    }
    
    Console.WriteLine(Encoding.ASCII.GetString(str));
  }
}