Algorithm

Problem Name: Algorithms - Compare the Triplets

Problem Link: https://www.hackerrank.com/challenges/compare-the-triplets/problem?isFullScreen=true

In this HackerRank Functions in Algorithms - Java programming problem solution,

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.

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] .
  • For the equal elements a[1] and 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 compareTriplets in the editor below.

compareTriplets has the following parameter(s):

  • int a[3]: Alice's challenge rating
  • int b[3]: Bob's challenge rating

Return

  • 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
  • 1 ≤ b[i] ≤ 100

Sample Input 0

5 6 7
3 6 10

Sample Output 0

1 1

 

 

Code Examples

#1 Code Example with C Programming

Code - C Programming


#include <stdio.h>

int main(){
    int alice[3];
    int bob[3];
    scanf("%d %d %d", &alice[0], &alice[1], &alice[2]);
    scanf("%d %d %d", &bob[0], &bob[1], &bob[2]);

    int score_alice = 0;
    int score_bob = 0;
    for (int i = 0; i < 3; i++) {
      if (alice[i] > bob[i])
        score_alice++;
      if (bob[i] > alice[i])
        score_bob++;
    }
    printf("%d %d\n", score_alice, score_bob);
    return 0;
}
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#2 Code Example with C++ Programming

Code - C++ Programming


#include <bits/stdc++.h>

using namespace std;

string ltrim(const string &);
string rtrim(const string &);
vector split(const string &);

// Complete the compareTriplets function below.
vector compareTriplets(vector a, vector b) {
    
    vector result;
    int aliceScore = 0;
    int bobScore = 0;

    for(int i = 0;i < a.size(); i++){
        if(a[i] > b[i]) 
            aliceScore ++;
        else if(b[i] > a[i])
            bobScore++;
        }         
        result.push_back(aliceScore);
        result.push_back(bobScore);
        return result;
}

int main()
{
    ofstream fout(getenv("OUTPUT_PATH"));

    string a_temp_temp;
    getline(cin, a_temp_temp);

    vector a_temp = split(rtrim(a_temp_temp));

    vector a(3);

    for (int i = 0; i < 3; i++) {
        int a_item = stoi(a_temp[i]);

        a[i] = a_item;
    }

    string b_temp_temp;
    getline(cin, b_temp_temp);

    vector b_temp = split(rtrim(b_temp_temp));

    vector b(3);

    for (int i = 0; i < 3; i++) {
        int b_item = stoi(b_temp[i]);

        b[i] = b_item;
    }

    vector result = compareTriplets(a, b);

    for (int i = 0; i < result.size(); i++) {
        fout << result[i];

        if (i != result.size() - 1) {
            fout << " ";
        }
    }

    fout << "\n";

    fout.close();

    return 0;
}

string ltrim(const string &str) {
    string s(str);

    s.erase(
        s.begin(),
        find_if(s.begin(), s.end(), not1(ptr_fun(isspace)))
    );

    return s;
}

string rtrim(const string &str) {
    string s(str);

    s.erase(
        find_if(s.rbegin(), s.rend(), not1(ptr_fun(isspace))).base(),
        s.end()
    );

    return s;
}

vector split(const string &str) {
    vector tokens;

    string::size_type start = 0;
    string::size_type end = 0;

    while ((end = str.find(" ", start)) != string::npos) {
        tokens.push_back(str.substr(start, end - start));

        start = end + 1;
    }

    tokens.push_back(str.substr(start));

    return tokens;
}
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#3 Code Example with Java Programming

Code - Java Programming


import java.io.*;
import java.util.*;
import java.text.*;
import java.math.*;
import java.util.regex.*;

public class Solution {
     
    //given values for ai and bi
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        int a0 = in.nextInt();
        int a1 = in.nextInt();
        int a2 = in.nextInt();
        int b0 = in.nextInt();
        int b1 = in.nextInt();
        int b2 = in.nextInt();
        
        //initialize both Alice's and Bob's points to 0
        int aliceCount = 0;
        int bobCount = 0;
        
        if(a0 > b0){
            aliceCount++;
        }
        else if(a0 < b0){
            bobCount++;
        }
        if(a1 > b1){
            aliceCount++;
        }
        else if (a1 < b1){
            bobCount++;
        }
        if(a2 > b2){
            aliceCount++;
        }
        else if(a2 < b2) {
            bobCount++;
        }
        
        System.out.println(aliceCount + " " + bobCount);
    }
}
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#4 Code Example with Javascript Programming

Code - Javascript Programming


'use strict';

const fs = require('fs');

process.stdin.resume();
process.stdin.setEncoding('utf-8');

let inputString = '';
let currentLine = 0;

process.stdin.on('data', function(inputStdin) {
    inputString += inputStdin;
});

process.stdin.on('end', function() {
    inputString = inputString.split('\n');

    main();
});

function readLine() {
    return inputString[currentLine++];
}

// Complete the compareTriplets function below.
function compareTriplets(a, b) {
    let p1 = 0, p2 = 0, aliceScore = 0, bobScore = 0;
    while (p1 < a.length && p2 < b.length) {
        if (a[p1] > b[p2]) {
            aliceScore += 1;
            p1 += 1;
            p2 += 1;
        } else if (a[p1] < b[p2]) {
            bobScore += 1;
            p1 += 1;
            p2 += 1;
            
        } else {
            p1 += 1;
            p2 += 1;
        }
    }
    return [aliceScore, bobScore];

}

function main() {
    const ws = fs.createWriteStream(process.env.OUTPUT_PATH);

    const a = readLine().replace(/\s+$/g, '').split(' ').map(aTemp => parseInt(aTemp, 10));

    const b = readLine().replace(/\s+$/g, '').split(' ').map(bTemp => parseInt(bTemp, 10));

    const result = compareTriplets(a, b);

    ws.write(result.join(' ') + '\n');

    ws.end();
}
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#5 Code Example with C# Programming

Code - C# Programming


using System.CodeDom.Compiler;
using System.Collections.Generic;
using System.Collections;
using System.ComponentModel;
using System.Diagnostics.CodeAnalysis;
using System.Globalization;
using System.IO;
using System.Linq;
using System.Reflection;
using System.Runtime.Serialization;
using System.Text.RegularExpressions;
using System.Text;
using System;

class Solution {

    // Complete the compareTriplets function below.
    static List compareTriplets(List a, List b) {
        int aliceScore = 0;
        int bobScore = 0;

        for (int i = 0; i < a.Count; i++)
        {
            if (a[i] == b[i]) continue;
            if (a[i] > b[i]) { aliceScore++; } else { bobScore++; }
        }

        return new List { aliceScore, bobScore };
    }

    static void Main(string[] args) {
        TextWriter textWriter = new StreamWriter(@System.Environment.GetEnvironmentVariable("OUTPUT_PATH"), true);

        List a = Console.ReadLine().TrimEnd().Split(' ').ToList().Select(aTemp => Convert.ToInt32(aTemp)).ToList();

        List b = Console.ReadLine().TrimEnd().Split(' ').ToList().Select(bTemp => Convert.ToInt32(bTemp)).ToList();

        List result = compareTriplets(a, b);

        textWriter.WriteLine(String.Join(" ", result));

        textWriter.Flush();
        textWriter.Close();
    }
}
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#6 Code Example with Python Programming

Code - Python Programming


import math
import os
import random
import re
import sys

def compareTriplets(a, b):
    sa = 0
    sb = 0
    for i in range(0,3):
        if a[i] > b[i]:
            sa += 1
        if a[i] < b[i]:
            sb += 1
    return [sa,sb]
        
if __name__ == '__main__':
    fptr = open(os.environ['OUTPUT_PATH'], 'w')

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

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

    result = compareTriplets(a, b)

    fptr.write(' '.join(map(str, result)))
    fptr.write('\n')

    fptr.close()
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