index.js

'use strict';

const fs = require('fs');

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 'serviceLane' function below.
 *
 * The function is expected to return an INTEGER_ARRAY.
 * The function accepts following parameters:
 *  1. INTEGER n
 *  2. 2D_INTEGER_ARRAY cases
 */

function serviceLane(cases, width) {
    // Write your code here
    
    let arrayCases = cases;
    let arrayWidth = width;
    
    let arrayFilterNumbers = [];
    let result = [];
    
    for(let i in arrayCases) {
        arrayFilterNumbers.push(arrayWidth.slice(arrayCases[i][0], arrayCases[i][1] + 1));
    }
    
    for(let i in arrayFilterNumbers) {
        result.push(Math.min(...arrayFilterNumbers[i]));
    }
    
    return result;
}

function main() {
    const ws = fs.createWriteStream(process.env.OUTPUT_PATH);

    const firstMultipleInput = readLine().replace(/\s+$/g, '').split(' ');

    const n = parseInt(firstMultipleInput[0], 10);

    const t = parseInt(firstMultipleInput[1], 10);

    const width = readLine().replace(/\s+$/g, '').split(' ').map(widthTemp => parseInt(widthTemp, 10));

    let cases = Array(t);

    for (let i = 0; i < t; i++) {
        cases[i] = readLine().replace(/\s+$/g, '').split(' ').map(casesTemp => parseInt(casesTemp, 10));
    }

    const result = serviceLane(cases, width);

    ws.write(result.join('\n') + '\n');

    ws.end();
}