Algorithm
Problem Name: Python -
In this HackerRank Functions in PYTHON problem solution,
CSS colors are defined using a hexadecimal (HEX) notation for the combination of Red, Green, and Blue color values (RGB).
Specifications of HEX Color Code
■ It must start with a '#' symbol.
■ It can have 3 or 6 digits.
■ Each digit is in the range of 0 to F (1,2,3,4,5,6,7,8,9,0,A,B,C,D,E and F.
■ A - F letters can be lower case. (a,b,c,d,e and f are also valid digits).
Examples
Valid Hex Color Codes
#FFF
#025
#F0A1FB
Invalid Hex Color Codes
#fffabg
#abcf
#12365erff
You are given N lines of CSS code. Your task is to print all valid Hex Color Codes, in order of their occurrence from top to bottom.
CSS Code Pattern
Selector
{
Property: Value;
}
Input Format
The first line contains N ,the number of code lines.
The next N lines contains CSS Codes.
Constraints
0 < N < 50
Output Format
Output the color codes with '#' symbols on separate lines.
Sample Input
11
#BED
{
color: #FfFdF8; background-color:#aef;
font-size: 123px;
background: -webkit-linear-gradient(top, #f9f9f9, #fff);
}
#Cab
{
background-color: #ABC;
border: 2px dashed #fff;
}
Sample Output
#FfFdF8
#aef
#f9f9f9
#fff
#ABC
#fff
Explanation
#BED and #Cab satisfy the Hex Color Code criteria, but they are used as selectors and not as color codes in the given CSS.
Hence, the valid color codes are:
#FfFdF8
#aef
#f9f9f9
#fff
#ABC
#fff
Note: There are no comments ( // or /* */) in CSS Code.
Code Examples
#1 Code Example with Python Programming
Code -
Python Programming
import re
n = int(input())
text = '\n'.join([input() for _ in range(n)])
pattern = re.compile(r'(?<=.)#[0-9a-fA-F]{3,6}')
matches = pattern.findall(text)
[print(match) for match in matches]