Practice>Python>Closures and Decorators>Standardize Mobile Number Using Decorators

hackerrank.com

Standardize Mobile Number Using Decorators

Problem Link : https://www.hackerrank.com/challenges/standardize-mobile-number-using-decorators/problem

Difficulty : Easy

 

Tip

• Use reverse index to substring aaaaa and bbbb from +91 aaaaa aaaaa
• Like aaaaa is s[-10:-5] and s[-5:0]
• Should uderstand how decorator work in python, it is a bit difficult
• Please understand how to use decorator, through reading share link in problem's concept

 

Solution

def wrapper(f): def fun(s): f('+91 {} {}'.format(a[-10:-5], a[-5:]) for a in s) return fun @wrapper def sort_phone(l): print(*sorted(l), sep='\n') if __name__ == '__main__': l = [input() for _ in range(int(input()))] sort_phone(l)