mathball/lib/fibbinary/index.js

A JavaScript library for Competitive Programming

'use strict';

var validate = require('../validation/positive-integer');

function isFibbinary(num) {
    if ((num & num >> 1) === 0) {
        return true;
    } else {
        return false;
    }
}

exports.check = function (num) {
    validate(num, 'fibbinary');
    return isFibbinary(num);
};