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class Dominator
    def solution(a)
        counter = 0
        candidate = 0

        a.each do |elem|
            if counter == 0
                candidate = elem
                counter += 1
            elsif candidate == elem

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class Fish
    def solution(weights, direction)
        stack = []
        survivor_count = 0

        weights.each_with_index do |elem, idx|
            if direction[idx] == 1
                stack.push(elem)
            else
                if stack.empty?

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class BracketDemo
    def solution(str)
        valid = true
        stack = []

        str.each_char do |char|
            case char
            when '[', '{', '('
                stack.push(char)
            when ']'

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class CyclicRotation
    def solution(array, num)
        new_array = Array.new(array.length)

        array.each_with_index do |element, idx|
            # (index + element) % array_size will give new index value to which we have to insert current value
            new_array[(idx + num) % array.length] = element
        end

        new_array

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class Solution
    def solution(array)
        left_part = array[0]
        right_part = array.sum - left_part
        diff = (left_part - right_part).abs
        total = array.length
        
        array.each_with_index do |element, index|
            next if index == 0

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require 'zip'

input_directory = '' # directory to be zipped
zipfile_name = '' # zip-file name

# zip a folder with only files (NO SUB FOLDERS)
Zip::File.open(zipfile_name, Zip::File::CREATE) do |zipfile|
  Dir[File.join(input_directory, '*')].each do |file|
    zipfile.add(file.sub(input_directory, ''), file)
  end

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require './my_aws_helper'

class AwsDemo
  include MyAwsHelper

  def start_execution
    p '1. Bucket Details, 2. Create Bucket 3. Upload To Bucket'
    choice = gets.chomp.to_i
    start_user_interaction(choice)
  end

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#!/bin/bash
# above line used to specify which shell to be used to execute the program
add() # function to add 2 numbers
{
num1=$1
num2=$2
sum=`expr $num1 + $num2`  # things insed the backtick `are evaluate or executed
echo "$num1 + $num2 = $sum"
}

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#!/bin/bash  
# Above line to specify which shell to be used to execute the program

echo "Enter first Number"  # echo used to print the message to screen
read first_number # read and store the input from terminal
echo "enter second Number"
read second_number

sum=`expr $first_number + $second_number`  # things insed the backtick ` are evaluate or executed 
echo "$first_number + $second_number = $sum"  # $ to specify arguments

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filename = gets.strip
res = []
File.open(filename).each do |line|
  res << line.split(' ').first
end

res_hash = Hash.new(0)
res.each { |i| res_hash[i] += 1 }

text_array = res_hash.to_a.map { |res| res.join(' ') }