Abstract

Alice and Bob each created one problem for HackerRank. A reviewer rates the two challenges, awarding points on a scale from 1 to 100 for three categories: problem clarity, originality, and difficulty.

Compare the Triplets#

The rating for Alice’s challenge is the triplet a = (a[0], a[1], a[2]), and the rating for Bob’s challenge is the triplet b = (b[0], b[1], b[2]).

The task is to find their comparison points by comparing a[0] with b[0], a[1] with b[1], and a[2] with b[2].

If a[i] > b[i], then Alice is awarded 1 point. If a[i] < b[i], then Bob is awarded 1 point. If a[i] = b[i], then neither person receives a point.

Comparison points is the total points a person earned.

Given a and b, determine their respective comparison points.

Example#

a = [1, 2, 3]
b = [3, 2, 1]

  • For elements 0, Bob is awarded a point because a[0] < b[0].

  • For elements 1, there is equality a[1] = b[1], no points are earned.

  • Finally, for elements 2, a[2] > b[2] so Alice receives a point.

The return array is [1, 1] with Alice’s score first and Bob’s second.

Function Description#

Complete the function compare_triplets in the editor below.

compare_triplets has the following parameter(s):

var list(int) a[3]:

Alice’s challenge rating

var list(int) b[3]:

Bob’s challenge rating

Return

var list(int)[2]:

Alice’s score is in the first position, and Bob’s score is in the second.

Input Format#

The first line contains 3 space-separated integers, a[0], a[1], and a[2], the respective values in triplet a. The second line contains 3 space-separated integers, b[0], b[1], and b[2], the respective values in triplet b.

Constraints#

\(1 ≤ a[i] ≤ 100\)ß

\(1 ≤ b[i] ≤ 100\)

Sample Input 0#

5 6 7
3 6 10

Sample Output 0#

1 1

Explanation 0#

In this example:

  • \(a = (a[0], a[1], a[2]) = (5, 6, 7)\)

  • \(b = (b[0], b[1], b[2]) = (3, 6, 10)\)

Now, let’s compare each individual score:

  • \(a[0] > b[0]\), so Alice receives \(1\) point.

  • \(a[1] = b[1]\), so nobody receives a point.

  • \(a[2] < a[2]\), so Bob receives \(1\) point.

Alice’s comparison score is \(1\), and Bob’s comparison score is \(1\). Thus, we return the array \([1, 1]\).

Sample Input 1#

17 28 30
99 16 8

Sample Output 1#

2 1

Explanation 1#

  • Comparing the \(0^{th}\) elements, \(17 < 99\) so Bob receives a point.

  • Comparing the \(1^{st}\) and \(2^{nd}\) elements, \(28 > 16\) and \(30 > 8\) so Alice receives two points.

The return array is \([2, 1]\).

Python Solution Docs#

This module contains a function to compare triplet values.

class compare_the_triplets.ScoreCompare(a_list, b_list)#

Define a ScoreCompare object.

Attribute list a:

An empty list.

Attribute list b:

Another empty list.

Attribute list scores:

A list with two values initialized to 0.

compare(a_int, b_int)#

Compare values for two integers.

Parameters:

  • a_int (int) – An integer value

  • b_int (int) – Another integer value

report_score()#

Report the current score.

compare_the_triplets.compare_triplets(a_trip, b_trip)#

Compare sets of triplets to provide a score.

Parameters:

  • a_trip (list) – INTEGER_ARRAY a, contains 3 values

  • b_trip (list) – INTEGER_ARRAY b, contains 3 values

Returns:

The function is expected to return an INTEGER_ARRAY with 2 values.

compare the triplets#

#!/usr/bin/env python3
"""This module contains a function to compare triplet values."""

import os
import pathlib

class ScoreCompare:
    """Define a ScoreCompare object.

    :attribute list a: An empty list.
    :attribute list b: Another empty list.
    :attribute list scores: A list with two values initialized to 0.
    """
    a = []
    b = []
    scores = [0, 0]

    def __init__(self, a_list, b_list):
        self.a = a_list
        self.b = b_list

    def compare(self, a_int, b_int):
        """Compare values for two integers.

        :param int a_int: An integer value
        :param int b_int: Another integer value
        """
        if a_int > b_int:
            self.scores[0] += 1
        elif a_int < b_int:
            self.scores[1] += 1

    def report_score(self):
        """Report the current score."""
        return self.scores

def compare_triplets(a_trip, b_trip):
    """Compare sets of triplets to provide a score.

    :param list a_trip: INTEGER_ARRAY a, contains 3 values
    :param list b_trip: INTEGER_ARRAY b, contains 3 values
    :return: The function is expected to return an INTEGER_ARRAY with 2 values.
    """
    sc_obj = ScoreCompare(a_trip, b_trip)

    for index, value in enumerate(a_trip):
        sc_obj.compare(value, b_trip[index])

    return sc_obj.scores

if __name__ == '__main__':
    a = list(map(int, input().rstrip().split()))

    b = list(map(int, input().rstrip().split()))

    result = compare_triplets(a, b)

    fpath = pathlib.Path(os.environ.get('OUTPUT_PATH'))
    with fpath.open('w', encoding='utf-8') as fp_handle:
        fp_handle.write(' '.join(map(str, result)))
        fp_handle.write('\n')

SCM#

Available in the related GitHub issue.

../../_images/solved.jpeg

Section author: Xander Harris xandertheharris@gmail.com#