DEV Community: Teja

30 Days of Code HackerRank using JAVASCRIPT DAY 2 : Operators

Teja — Sat, 13 Jul 2024 05:07:54 +0000

Task
Given the meal price (base cost of a meal), tip percent (the percentage of the meal price being added as 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.

Example

meal cost = 100
tip percentage = 15
tax percentage = 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 below.

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.

SOLUTION

HackerRank 3 Months Preparation Kit(JavaScript) - Mini-Max Sum

Teja — Mon, 08 Jul 2024 06:03:56 +0000

Given five positive integers, find the minimum and maximum values that can be calculated by summing exactly four of the five integers. Then print the respective minimum and maximum values as a single line of two space-separated long integers.
Example
arr=[1,3,5,7,9]

The minimum sum is 1+3+5+7 = 16 and the maximum sum is 3+5+7+9 = 24. The function prints 16 24.

We will be discussing two methods to solve this;

one is using the sort() method.

Here in the above method the time complexity will be "O(nlogn)" due to sort() method. To make the time complexity better, the optimized code is given below.

This code above has only one for loop and hence the time complexity is O(n).

HackerRank 3 Months Preparation Kit(JavaScript) - Plus Minus

Teja — Mon, 08 Jul 2024 01:52:07 +0000

Given an array of integers, calculate the ratios of its elements that are positive, negative, and zero. Print the decimal value of each fraction on a new line with 6 places after the decimal.
Note: This challenge introduces precision problems. The test cases are scaled to six decimal places, though answers with absolute error of up to 10 to the power -4 are acceptable.

Example
arr = [1,1,0,-1,-1]
There are n = 5 elements, two positive, two negative and one zero. Their ratios are 2/5, 2/5 and 1/5. Results are printed as:
0.400000
0.400000
0.200000

Function Description

Complete the plusMinus function in the editor below.

plusMinus has the following parameter(s):

int arr[n]: an array of integers

Print

Print the ratios of positive, negative and zero values in the array. Each value should be printed on a separate line with 6 digits after the decimal. The function should not return a value.

Input Format

The first line contains an integer, n, the size of the array.
The second line contains n space-separated integers that describe arr[n]

SOLUTION

30 Days of Code HackerRank using JAVASCRIPT DAY 1

Teja — Sun, 07 Jul 2024 20:01:36 +0000

Objective
Today, we're discussing data types. Check out the Tutorial tab for learning materials and an instructional video!

Task
Complete the code in the editor below. The variables i, d, and s are already declared and initialized for you. You must:

Declare 3 variables: one of type int, one of type double, and one of type String.
Read 3 lines of input from stdin (according to the sequence given in the Input Format section below) and initialize your variables.
Use the + operator to perform the following operations:
1. Print the sum of i plus your int variable on a new line.
2. Print the sum of d plus your double variable to a scale of one decimal place on a new line.
3. Concatenate s with the string you read as input and print the result on a new line. Note: If you are using a language that doesn't support using + for string concatenation (e.g.: C), you can just print one variable immediately following the other on the same line. The string provided in your editor must be printed first, immediately followed by the string you read as input.

Input Format

The first line contains an integer that you must sum with i.
The second line contains a double that you must sum with d.
The third line contains a string that you must concatenate with s.

Output Format

Print the sum of both integers on the first line, the sum of both doubles (scaled to 1 decimal place) on the second line, and then the two concatenated strings on the third line.

*Sample Input
*
12
4.0
is the best place to learn and practice coding!

*Sample Output
*
16
8.0
HackerRank is the best place to learn and practice coding!

SOLUTION

30 Days of Code HackerRank using JAVASCRIPT DAY 0

Teja — Sun, 07 Jul 2024 19:49:40 +0000

Objective
In this challenge, we review some basic concepts that will get you started with this series. You will need to use the same (or similar) syntax to read input and write output in challenges throughout HackerRank. Check out the Tutorial tab for learning materials and an instructional video!

Task
To complete this challenge, you must save a line of input from stdin to a variable, print Hello, World. on a single line, and finally print the value of your variable on a second line.

You've got this!

Note: The instructions are Java-based, but we support submissions in many popular languages. You can switch languages using the drop-down menu above your editor, and the variable may be written differently depending on the best-practice conventions of your submission language.

Input Format

A single line of text denoting (the variable whose contents must be printed).

Output Format

Print Hello, World. on the first line, and the contents of on the second line.

Sample Input

Welcome to 30 Days of Code!
Sample Output

Hello, World.
Welcome to 30 Days of Code!
Explanation

On the first line, we print the string literal Hello, World.. On the second line, we print the contents of the variable which, for this sample case, happens to be Welcome to 30 Days of Code!. If you do not print the variable's contents to stdout, you will not pass the hidden test case.

SOLUTION: