015-two-sum.js

'use strict';

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

let inputString = '';
let currentLine = 0;

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

process.stdin.on('end', function() {
    inputString = inputString.split('\n');

    main();
});

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



/*
 * Complete the 'findTaskPairForSlot' function below.
 *
 * The function is expected to return an INTEGER_ARRAY.
 * The function accepts following parameters:
 *  1. INTEGER_ARRAY taskDurations
 *  2. INTEGER slotLength
 */

function findTaskPairForSlot(taskDurations, slotLength) {
    const map = new Map();
    
    for (let i = 0; i < taskDurations.length; i++) {
        const diff = slotLength - taskDurations[i];
        
        if (map.has(diff)) {
            return [map.get(diff), i];
        }
        
        map.set(taskDurations[i], i);
    }
    
    return [-1, -1];
}

function main() {
    const taskDurationsCount = parseInt(readLine().trim(), 10);

    let taskDurations = [];

    for (let i = 0; i < taskDurationsCount; i++) {
        const taskDurationsItem = parseInt(readLine().trim(), 10);
        taskDurations.push(taskDurationsItem);
    }

    const slotLength = parseInt(readLine().trim(), 10);

    const result = findTaskPairForSlot(taskDurations, slotLength);

    process.stdout.write(result.join('\n') + '\n');
}