Reduce Function HackerRank Solution In Python

Problem

Given a list of rational numbers,find their product.

Concept

The reduce() function applies a function of two arguments cumulatively on a list of objects in succession from left to right to reduce it to one value. Say you have a list, say [1,2,3] and you have to find its sum.

>>> reduce(lambda x, y : x + y,[1,2,3])6

You can also define an initial value. If it is specified, the function will assume initial value as the value given, and then reduce. It is equivalent to adding the initial value at the beginning of the list. For example:

>>> reduce(lambda x, y : x + y, [1,2,3], -3)
3

>>> from fractions import gcd
>>> reduce(gcd, [2,4,8], 3)
1

Input Format

First line contains n, the number of rational numbers.
The i^th of next  lines contain two integers each, the numerator( N_i ) and denominator( D_i ) of the i^th rational number in the list.

Constraints

• 1 ≤ n ≤ 100
• 1 ≤ N_i, D_i ≤ 100

Output Format

Print only one line containing the numerator and denominator of the product of the numbers in the list in its simplest form, i.e. numerator and denominator have no common divisor other than 1.

Sample Input 0

31 23 410 6

Sample Output 0

5 8

Explanation 0

Required product is 

Solution – Reduce Function In Python | HackerRank

from fractions import Fractionfrom functools import reducedef product(fracs):    t = reduce(lambda x, y: x*y, fracs)    return t.numerator, t.denominatorif __name__ == '__main__':    fracs = []    for _ in range(int(input())):        fracs.append(Fraction(*map(int, input().split())))    result = product(fracs)    print(*result)

NOTE: The problem solved above, Reduce Function, was generated by HackerRank and the solution was brought by the admin of  CodingSolutions for educational purpose. Got any issues with the code? Ask your questions in the comment box and I shall attend to it.