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++14 (GCC 5.4.1) (judge verdict: Accepted)

#define _GLIBCXX_DEBUG

#include <bits/stdc++.h>

using namespace std;
typedef long long ll;

constexpr ll INF = 1e16;

#define rep(i, N) for(ll i=0; i<N; ++i)

ll max(ll a, ll b) {return a < b ? b : a; }
ll min(ll a, ll b) {return a > b ? b : a; }
double maxf(double a, double b) { return a < b ? b : a; }

int main() {
  int n;
  char s[10010];
  cin>>n;
  cin>>s;

  int len = strlen(s);
  for(int i = 0; i < len; i++){
    int x = s[i] - 'A';
    x = (x + n)%26;
    putchar('A' + x);
  }

  return 0;
}