Problem:
Score : 200 points

Problem Statement

You are given a image with a height of H pixels and a width of W pixels.
Each pixel is represented by a lowercase English letter.
The pixel at the i-th row from the top and j-th column from the left is a_{ij}.

Put a box around this image and output the result. The box should consist of # and have a thickness of 1.

Constraints

1 ≤ H, W ≤ 100

a_{ij} is a lowercase English letter.

Input

Input is given from Standard Input in the following format:

H W
a_{11} ... a_{1W}
:
a_{H1} ... a_{HW}

Output

Print the image surrounded by a box that consists of # and has a thickness of 1.

Sample Input 1

2 3
abc
arc

Sample Output 1

#####
#abc#
#arc#
#####

Sample Input 2

1 1
z

Sample Output 2

###
#z#
###

Solution in Rust (1.15.1) (judge verdict: Wrong Answer)


use std::io;
use std::io::Write;

fn main() {

    let mut input = String::new();

    io::stdin().read_line(&mut input);
    let mut iter = input.split_whitespace();

    let h = iter.next().unwrap().parse::<i32>().unwrap();
    let w = iter.next().unwrap().parse::<i32>().unwrap();

    let mut a = [[0u8; 100]; 100];

    for i in 0..h {
        let mut line = String::new();

        io::stdin().read_line(&mut line);
        let line = line.as_bytes();
        for j in 0..w {
            a[i as usize][j as usize] = line[j as usize];
        }
    }

    for j in 0..(w+2) {
        print!("#");
    }
    println!("");

    for i in 0..h {
        print!("#");
        io::stdout().write(&a[i as usize]);
        println!("#");
    }

    for j in 0..(w+2) {
        print!("#");
    }
    println!("");
}