Problem:
Score : 300 points

Problem Statement

You are given an integer sequence of length n, a_1, ..., a_n.
Let us consider performing the following n operations on an empty sequence b.

The i-th operation is as follows:

Append a_i to the end of b.

Reverse the order of the elements in b.

Find the sequence b obtained after these n operations.

Constraints

1 \leq n \leq 2\times 10^5

0 \leq a_i \leq 10^9

n and a_i are integers.

Input

Input is given from Standard Input in the following format:

n
a_1 a_2 ... a_n

Output

Print n integers in a line with spaces in between.
The i-th integer should be b_i.

Sample Input 1

4
1 2 3 4

Sample Output 1

4 2 1 3

After step 1 of the first operation, b becomes: 1.

After step 2 of the first operation, b becomes: 1.

After step 1 of the second operation, b becomes: 1, 2.

After step 2 of the second operation, b becomes: 2, 1.

After step 1 of the third operation, b becomes: 2, 1, 3.

After step 2 of the third operation, b becomes: 3, 1, 2.

After step 1 of the fourth operation, b becomes: 3, 1, 2, 4.

After step 2 of the fourth operation, b becomes: 4, 2, 1, 3.

Thus, the answer is 4 2 1 3.

Sample Input 2

3
1 2 3

Sample Output 2

3 1 2

As shown above in Sample Output 1, b becomes 3, 1, 2 after step 2 of the third operation. Thus, the answer is 3 1 2.

Sample Input 3

1
1000000000

Sample Output 3

1000000000

Sample Input 4

6
0 6 7 6 7 0

Sample Output 4

0 6 6 0 7 7

Solution in Rust (1.15.1) (judge verdict: Accepted)

use std::io::*;
use std::str::*;

const MOD: i32 = 1000000007;

fn read<T: FromStr>() -> Option<T> {
    let stdin = stdin();
    let s = stdin
        .bytes()
        .map(|c| c.unwrap() as char)
        .take_while(|c| !c.is_whitespace())
        .collect::<String>();
    s.parse::<T>().ok()
}

fn main() {
    let n: usize = read().unwrap();

    let mut b = Vec::new();
    for i in 0..n {
        let tmp: u64 = read().unwrap();
        b.push(tmp);
    }
    let mut ans = Vec::new();
    if n % 2 == 0 {
        for i in (0..n).rev() {
            if i % 2 == 0 {
                continue;
            }
            ans.push(b[i]);
        }
        for i in 0..n {
            if i % 2 != 0 {
                continue;
            }
            ans.push(b[i]);
        }
    } else {
        for i in (0..n).rev() {
            if i % 2 != 0 {
                continue;
            }
            ans.push(b[i]);
        }
        for i in 0..n {
            if i % 2 == 0 {
                continue;
            }
            ans.push(b[i]);
        }
    }
    for i in 0..n - 1 {
        print!("{} ", ans[i]);
    }
    println!("{}", ans[n - 1]);

    // let mut b = Vec::new();
    // for i in 0..n {
    //     let tmp: u64 = read().unwrap();
    //     b.push(tmp);
    //     b.reverse();
    // }
    // for i in 0..n - 1 {
    //     print!("{} ", b[i]);
    // }
    // println!("{}", b[n - 1]);
}