Hackerrank - B'day Gift - Pavol Pidanič

Popis problému
Celý popis zadania sa nacháza – Hackerrank.

Riešenie
Najskôr spočítaj všetky prvky z konzoly (sum). Výsledok je sum / 2.

Vytvoril som riešenie v týchto programovacích jazykoch:

Java
JavaScript
Scala
Ruby

Všetky riešenia sú dostupné aj na mojom GitHub profile.

Java

import java.util.*;

public class BdayGift {

    public static void main(String[] args) {
        Scanner stdin = new Scanner(System.in);
        int tests = stdin.nextInt();
        long sum = 0;
        for(int i = 0; i < tests; i++) {
            sum += stdin.nextInt();
        }
        System.out.format("%.1f", (double) sum / 2);
        stdin.close();
    }
}

import java.util.*;

public class BdayGift {

public static void main(String[] args) {

Scanner stdin = new Scanner(System.in);

int tests = stdin.nextInt();

long sum = 0;

for(int i = 0; i < tests; i++) {

sum += stdin.nextInt();

}

System.out.format("%.1f", (double) sum / 2);

stdin.close();

}

JavaScript

'use strict';

var _ = require('lodash');

const processData = input => {
    let arr = input.split('\n').slice(1).map(i => parseInt(i))
    let sum = _.sum(arr);
    console.log((sum / 2) + (sum % 2 == 0 ? '.0' : ''));
};

process.stdin.resume();
process.stdin.setEncoding("ascii");

var _input = "";
process.stdin.on("data", input => _input += input);
process.stdin.on("end", () => processData(_input));

'use strict';

var _ = require('lodash');

const processData = input => {

let arr = input.split('\n').slice(1).map(i => parseInt(i))

let sum = _.sum(arr);

console.log((sum / 2) + (sum % 2 == 0 ? '.0' : ''));

};

process.stdin.resume();

process.stdin.setEncoding("ascii");

var _input = "";

process.stdin.on("data", input => _input += input);

process.stdin.on("end", () => processData(_input));

Scala

import scala.io.Source

object BdayGift extends App {
  val lines = Source.stdin.getLines().drop(1).map(_.toLong)
  printf("%.1f", lines.sum.toDouble / 2)
}

import scala.io.Source

object BdayGift extends App {

val lines = Source.stdin.getLines().drop(1).map(_.toLong)

printf("%.1f", lines.sum.toDouble / 2)

}

Ruby

balls = gets.chomp.to_i
expected_num = 0
balls.times do
  input = gets.chomp.to_i
  expected_num += input
end
expected_num /= 2.0
puts "#{format('%.1f', expected_num)}"

balls = gets.chomp.to_i

expected_num = 0

balls.times do

input = gets.chomp.to_i

expected_num += input

end

expected_num /= 2.0

puts "#{format('%.1f', expected_num)}"

Pavol Pidanič

Dokážem na 10 prstoch napočítať do 1023

Hackerrank – B’day Gift