Sandbox::https://github.com/prabaprakash/Hackerrank-JavaScript-Solutions/blob/master/drawing-book.js

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'use strict';

const fs = require('fs');

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(str => str.trim());

main();

});

function readLine() {

return inputString[currentLine++];

}

* Complete the pageCount function below.

function pageCount(n, p) {

let goalpage = Math.floor(p/2);

let lastpage = Math.floor(n/2);

return Math.floor(Math.min(goalpage, Math.abs(lastpage-goalpage)));

}

function main() {

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

const n = parseInt(readLine(), 10);

const p = parseInt(readLine(), 10);

let result = pageCount(n, p);

ws.write(result + "\n");

ws.end();

}