Alphabet Rangoli Hacker Rank Solution – Queslers

Problem: Alphabet Rangoli Hacker Rank Solution

You are given an integer, N. Your task is to print an alphabet rangoli of size N. (Rangoli is a form of Indian folk art based on creation of patterns.)

Different sizes of alphabet rangoli are shown below:

#size 3

----c----
--c-b-c--
c-b-a-b-c
--c-b-c--
----c----

#size 5

--------e--------
------e-d-e------
----e-d-c-d-e----
--e-d-c-b-c-d-e--
e-d-c-b-a-b-c-d-e
--e-d-c-b-c-d-e--
----e-d-c-d-e----
------e-d-e------
--------e--------

#size 10

------------------j------------------
----------------j-i-j----------------
--------------j-i-h-i-j--------------
------------j-i-h-g-h-i-j------------
----------j-i-h-g-f-g-h-i-j----------
--------j-i-h-g-f-e-f-g-h-i-j--------
------j-i-h-g-f-e-d-e-f-g-h-i-j------
----j-i-h-g-f-e-d-c-d-e-f-g-h-i-j----
--j-i-h-g-f-e-d-c-b-c-d-e-f-g-h-i-j--
j-i-h-g-f-e-d-c-b-a-b-c-d-e-f-g-h-i-j
--j-i-h-g-f-e-d-c-b-c-d-e-f-g-h-i-j--
----j-i-h-g-f-e-d-c-d-e-f-g-h-i-j----
------j-i-h-g-f-e-d-e-f-g-h-i-j------
--------j-i-h-g-f-e-f-g-h-i-j--------
----------j-i-h-g-f-g-h-i-j----------
------------j-i-h-g-h-i-j------------
--------------j-i-h-i-j--------------
----------------j-i-j----------------
------------------j------------------

The center of the rangoli has the first alphabet letter a, and the boundary has the Nth alphabet letter (in alphabetical order).

Input Format

Only one line of input containing N, the size of the rangoli.

Constraints

0 < N < 27

Output Format

Print the alphabet rangoli in the format explained above.

Sample Input

5

Sample Output

--------e--------
------e-d-e------
----e-d-c-d-e----
--e-d-c-b-c-d-e--
e-d-c-b-a-b-c-d-e
--e-d-c-b-c-d-e--
----e-d-c-d-e----
------e-d-e------
--------e--------

Alphabet Rangoli Hacker Rank Solution in Python 2

from copy import deepcopy
N = int(raw_input())
row = 2 * (N - 1) + 1
col = (N - 1) * 4 + 1
arr = ['-'] * col
res = []
for _ in xrange(row): res.append(deepcopy(arr))
mr = row / 2
mc = col / 2
for i in xrange(mr + 1):
    ch = ord('a') + i
    for j in xrange(N - i):
        res[mr - i][mc - 2 * j] = chr(ch + j)
        res[mr - i][mc + 2 * j] = chr(ch + j)
        res[mr + i][mc - 2 * j] = chr(ch + j)
        res[mr + i][mc + 2 * j] = chr(ch + j)
for r in res:
    print ''.join(r)

Alphabet Rangoli Hacker Rank Solution in Python 3

def print_rangoli(size):
    alpha = "abcdefghijklmnopqrstuvwxyz"
    data = [alpha[i] for i in range(n)]
    items = list(range(n))
    items = items[:-1]+items[::-1]
    for i in items:
        temp = data[-(i+1):]
        row = temp[::-1]+temp[1:]
        print("-".join(row).center(n*4-3, "-"))

Alphabet Rangoli Hacker Rank Solution in pypy

import string
def print_rangoli(size):
    alpha = string.ascii_lowercase
    n = size
    L = []
    for i in range(n):
        s = "-".join(alpha[i:n])
        L.append((s[::-1]+s[1:]).center(4*n-3, "-"))
    print('\n'.join(L[:0:-1]+L))

Alphabet Rangoli Hacker Rank Solution in pypy3

import string
alpha = string.ascii_lowercase

n = int(input())
L = []
for i in range(n):
    s = "-".join(alpha[i:n])
    L.append((s[::-1]+s[1:]).center(4*n-3, "-"))
print('\n'.join(L[:0:-1]+L))
Alphabet Rangoli Hacker Rank Solution Review:

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