Flipping bits

Read Time:47 Second

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 'flippingBits' function below.
 *
 * The function is expected to return a LONG_INTEGER.
 * The function accepts LONG_INTEGER n as parameter.
 */

function flippingBits(n) {
 const arrbit=[0];
 for(let a=0;a<32;a++){
     let mask=1;
     let bit= n & (mask<<a);
     if(bit==0){
         arrbit[a]=1;
     }else {
         arrbit[a]=0;
     }
 }
 
 const newBinary=arrbit.reverse().join("");
 return parseInt(newBinary,2);

}

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

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

    for (let qItr = 0; qItr < q; qItr++) {
        const n = parseInt(readLine().trim(), 10);

        const result = flippingBits(n);

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

    ws.end();
}