HackerRank Solutions - Day 2 - 30 Days of Code

HackerRank Day 2: Operators – 30 Days of Code Solution

In this article, we will be solving HackerRank Day 2: Operators problem, part of 30 Days of Code. Majorly, we will use Python3 and Java15 to solve the problem.


In this challenge, you will work with arithmetic operators. Check out the Tutorial tab for learning materials and an instructional video.


Given the meal price (base cost of a meal), tip percent (the percentage of the meal price being added as a tip), and tax percent (the percentage of the meal price being added as tax) for a meal, find and print the meal’s total cost. Round the result to the nearest integer.


  • mealCost = 100
  • tipPercent = 15
  • taxPercent = 8

A tip of 15% * 100 = 15, and the taxes are 8% * 100 = 8. Print the value 123 and return from the function.

Function Description

Complete the solve function in the editor of HackerRank.

Function solve has the following parameters:

  • int meal_cost: the cost of food before tip and tax
  • int tip_percent: the tip percentage
  • int tax_percent: the tax percentage

Returns The function returns nothing. Print the calculated value, rounded to the nearest integer.

Note: Be sure to use precise values for your calculations, or you may end up with an incorrectly rounded result.

Input Format

There are 3 lines of numeric input:

  • The first line has a double, mealCost (the cost of the meal before tax and tip).
  • The second line has an integer, tipPercent (the percentage of mealCost being added as tip).
  • The third line has an integer, taxPercent (the percentage of mealCost being added as tax).

Sample Input


Sample Output




meal_cost = 12, tip_percent = 20, tax_percent = 8


  1. tip = 12 and ((12/100) * 20) = 2.4
  2. tax = 8 and ((8/100) * 20) = 0.96
  3. total_cost = meal_cost + tip + tax = 12 + 2.4 + 0.96 = 15.36
  4. round(total_cost) = 15
  5. We round total_cost to the nearest integer and print the result, 15.

You can find all the source code on my GitHub profile: https://github.com/uttammanani/HackerRank-30-Days-of-Code

Solution Day 2: Operators in Python3


import math
import os
import random
import re
import sys

# Complete the 'solve' function below.
# The function accepts following parameters:
#  1. DOUBLE meal_cost
#  2. INTEGER tip_percent
#  3. INTEGER tax_percent

def solve(meal_cost, tip_percent, tax_percent):
    # Write your code here
    tip = (tip_percent * meal_cost) / 100
    tax = (tax_percent * meal_cost) / 100
    total_cost = round(meal_cost + tip + tax)

if __name__ == '__main__':
    meal_cost = float(input().strip())

    tip_percent = int(input().strip())

    tax_percent = int(input().strip())

    solve(meal_cost, tip_percent, tax_percent)

Solution Day 2: Operators in Java15

import java.io.*;
import java.math.*;
import java.security.*;
import java.text.*;
import java.util.*;
import java.util.concurrent.*;
import java.util.function.*;
import java.util.regex.*;
import java.util.stream.*;
import static java.util.stream.Collectors.joining;
import static java.util.stream.Collectors.toList;

class Result {

     * Complete the 'solve' function below.
     * The function accepts following parameters:
     *  1. DOUBLE meal_cost
     *  2. INTEGER tip_percent
     *  3. INTEGER tax_percent

    public static void solve(double meal_cost, int tip_percent, int tax_percent) {
    // Write your code here
        double tip=meal_cost*tip_percent/100;
        double tax=meal_cost*tax_percent/100;
        int totalCost=(int)Math.round(meal_cost+tip+tax);


public class Solution {
    public static void main(String[] args) throws IOException {
        BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(System.in));

        double meal_cost = Double.parseDouble(bufferedReader.readLine().trim());

        int tip_percent = Integer.parseInt(bufferedReader.readLine().trim());

        int tax_percent = Integer.parseInt(bufferedReader.readLine().trim());

        Result.solve(meal_cost, tip_percent, tax_percent);

HackerRank Day 2 – Output – 30 Days of Code

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