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 Rust (1.15.1) (judge verdict: Accepted)

macro_rules! inputln {
    ($t:ty) => {{
        let mut l = String::new();
        std::io::stdin().read_line(&mut l).unwrap();
        l.trim().parse::<$t>().unwrap()
    }};
    ($($t:ty),*) => {{
        let mut l = String::new();
        std::io::stdin().read_line(&mut l).unwrap();
        let mut it = l.split_whitespace();
        ($(it.next().unwrap().parse::<$t>().unwrap(),)*)
    }};
    /*
    ($t:ty,$n:expr) => {{
        let mut l = String::new();
        std::io::stdin().read_line(&mut l).unwrap();
        let mut it = l.split_whitespace();
       vec![$(it.next().unwrap().parse::<$t>().unwrap(),)*]
    }};
    */
    ($t:ty; $n:expr) => {
        (0..$n).map(|_|
            get!($t)
        ).collect::<Vec<_>>()
    };
    ($($t:ty),*; $n:expr) => {
        (0..$n).map(|_|
            get!($($t),*)
        ).collect::<Vec<_>>()
    };
    ($t:ty ;;) => {
        {
            let mut line: String = String::new();
            std::io::stdin().read_line(&mut line).unwrap();
            line.split_whitespace()
                .map(|t| t.parse::<$t>().unwrap())
                .collect::<Vec<_>>()
        }
    };
    ($t:ty ;; $n:expr) => {
        (0..$n).map(|_| get!($t ;;)).collect::<Vec<_>>()
    };
}

fn get_num_from_char(c:char)->usize{
    let v = vec!['A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P','Q','R','S','T','U','V','W','X','Y','Z'];
    for x in 0..26 {
        if c == v[x] {
            return x;
        }
    }
    return 0;
}

fn get_char_from_num(n:usize)->char{
    let v = vec!['A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P','Q','R','S','T','U','V','W','X','Y','Z'];
    return v[n];
}

fn main() {
    let n = inputln!(usize);
    let s = inputln!(String);
    let mut result = String::new();

    for c in s.as_str().chars() {
        result.push(get_char_from_num((get_num_from_char(c) + n)%26));
    }
    println!("{}",result);
}