Hacker-rank min-max sum.js

'use strict';

process.stdin.resume();
process.stdin.setEncoding('utf-8');

let inputString = '';
let currentLine = 0;

process.stdin.on('data', inputStdin => {
    inputString += inputStdin;
});

process.stdin.on('end', _ => {
    inputString = inputString.replace(/\s*$/, '')
        .split('\n')
        .map(str => str.replace(/\s*$/, ''));

    main();
});

function readLine() {
    return inputString[currentLine++];
}

// Complete the miniMaxSum function below.
function miniMaxSum(arr) {
    arr.sort((a, b) => a - b)
    let first = arr.slice(0, -1);
    let last = arr.slice(1)

    let minSum = first.reduce((a, b) => a + b, 0);
    let maxSum = last.reduce((a, b) => a + b, 0);

    console.log(minSum + " " + maxSum)

}

function main() {
    const arr = readLine().split(' ').map(arrTemp => parseInt(arrTemp, 10));

    miniMaxSum(arr);
}