[해커랭크] Simple Array Sum

 

Simple Array Sum

EasyProblem Solving (Basic)Max Score: 10Success Rate: 94.74%

Calculate the sum of integers in an array.

 

 

문제

Given an array of integers, find the sum of its elements.

For example, if the array , , so return .

Function Description

Complete the  function with the following parameter(s):

• : an array of integers

Returns

• : the sum of the array elements

Input Format

The first line contains an integer, , denoting the size of the array.
The second line contains  space-separated integers representing the array's elements.

Constraints

 

Sample Input

STDIN           Function
-----           --------
6               ar[] size n = 6
1 2 3 4 10 11   ar = [1, 2, 3, 4, 10, 11]

Sample Output

31

 

Explanation

Print the sum of the array's elements: .

 

 

 

풀이

그저 반복문 돌며 더하면 끝

 

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 'simpleArraySum' function below.

     *

     * The function is expected to return an INTEGER.

     * The function accepts INTEGER_ARRAY ar as parameter.

     */

    public static int simpleArraySum(List<Integer> ar) {

    // Write your code here

    }

}

public class Solution {

    public static void main(String[] args) throws IOException {

        BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(System.in));

        BufferedWriter bufferedWriter = new BufferedWriter(new FileWriter(System.getenv("OUTPUT_PATH")));

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

        List<Integer> ar = Stream.of(bufferedReader.readLine().replaceAll("\\s+$", "").split(" "))

            .map(Integer::parseInt)

            .collect(toList());

        int result = Result.simpleArraySum(ar);

        bufferedWriter.write(String.valueOf(result));

        bufferedWriter.newLine();

        bufferedReader.close();

        bufferedWriter.close();

    }

}