Hackerrank - Simple Array Sum

Problem Statement
A description of the problem can be found on Hackerrank.

Solution
As this challenge is in Warmup subdomain, solution is pretty easy. The only thing to do is to be able to read from input given n times and make sum of all numbers.

I created solution in 4 languages:

Scala
Java
JavaScript
Ruby

All solutions are also available on my GitHub.

Scala

object SimpleArraySum extends App {
  val console = io.Source.stdin.bufferedReader()
  val n = console.readLine().toInt;
  println(console.readLine().split(" ").map(_.toInt).sum)
}

object SimpleArraySum extends App {

val console = io.Source.stdin.bufferedReader()

val n = console.readLine().toInt;

println(console.readLine().split(" ").map(_.toInt).sum)

}

Java

import java.util.Scanner;

public class SimpleArraySum {
    public static void main(String[] args) {
        Scanner stdin = new Scanner(System.in);
        final int n = stdin.nextInt();
        int sum = 0;
        for(int i = 0; i < n; i++) {
            sum += stdin.nextInt();
        }
        System.out.println(sum);
    }
}

import java.util.Scanner;

public class SimpleArraySum {

public static void main(String[] args) {

Scanner stdin = new Scanner(System.in);

final int n = stdin.nextInt();

int sum = 0;

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

sum += stdin.nextInt();

}

System.out.println(sum);

}

JavaScript

var sum = 0;
function processData(input) {
    var lines = input.split("\n");
    var n = parseInt(lines[0]);
    var arr = lines[1].split(" ");
    for (var i = 0; i < n; i++) {
        sum += parseInt(arr[i]);
    }
    console.log(sum);
}

process.stdin.resume();
process.stdin.setEncoding("ascii");
_input = "";
process.stdin.on("data", function (input) {
    _input += input;
});

process.stdin.on("end", function () {
    processData(_input);
});

var sum = 0;

function processData(input) {

var lines = input.split("\n");

var n = parseInt(lines[0]);

var arr = lines[1].split(" ");

for (var i = 0; i < n; i++) {

sum += parseInt(arr[i]);

}

console.log(sum);

}

process.stdin.resume();

process.stdin.setEncoding("ascii");

_input = "";

process.stdin.on("data", function (input) {

_input += input;

});

process.stdin.on("end", function () {

processData(_input);

});

Ruby

n = gets.to_i
arr = gets.split(" ").map { |c| c.to_i }
sum = 0
for i in arr do
  sum += i
end
puts sum

n = gets.to_i

arr = gets.split(" ").map { |c| c.to_i }

sum = 0

for i in arr do

sum += i

end

puts sum

Pavol Pidanič

I can count to 1023 with 10 fingers

Hackerrank – Simple Array Sum