js10-template-literals.js

// Tutorials > 10 Days of Javascript > Day 5: Template Literals
// JavaScript Template Strings
//
// https://www.hackerrank.com/challenges/js10-template-literals/problem
// challenge id: 21886
//

'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.trim().split('\n').map(string => {
        return string.trim();
    });

    main();
});

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

/*
 * Determine the original side lengths and return an array:
 * - The first element is the length of the shorter side
 * - The second element is the length of the longer side
 *
 * Parameter(s):
 * literals: The tagged template literal's array of strings.
 * expressions: The tagged template literal's array of expression values (i.e., [area, perimeter]).
 */
function sides(literals, ...expressions) {

    let area = expressions[0];
    let perimeter = expressions[1];

    let a = (perimeter - Math.sqrt(perimeter * perimeter - 16 * area)) / 4;
    let b = (perimeter + Math.sqrt(perimeter * perimeter - 16 * area)) / 4;

    return [a, b];
}

// (skeliton_tail) ----------------------------------------------------------------------
function main() {
    let s1 = +(readLine());
    let s2 = +(readLine());

    [s1, s2] = [s1, s2].sort();

    const [x, y] = sides`The area is: ${s1 * s2}.\nThe perimeter is: ${2 * (s1 + s2)}.`;

    console.log((s1 === x) ? s1 : -1);
    console.log((s2 === y) ? s2 : -1);
}