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add-binary.js
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add-binary.js
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/**
* @param {string} a
* @param {string} b
* @return {string}
*/
var addBinary = function(a, b) {
let longest = ""
let shortest = ""
let solution = []
if(a.length >= b.length) {
longest = a
shortest = b
} else {
longest = b
shortest = a
}
let longEnd = longest.length - 1
let shortEnd = shortest.length - 1
let remainder = 0
while (longEnd >= 0) {
if(shortEnd >= 0) {
if(parseInt(longest[longEnd]) + parseInt(shortest[shortEnd]) + remainder === 3) {
solution.unshift(1)
remainder = 1
} else if(parseInt(longest[longEnd]) + parseInt(shortest[shortEnd]) + remainder === 2) {
solution.unshift(0)
remainder = 1
} else if(parseInt(longest[longEnd]) + parseInt(shortest[shortEnd]) + remainder === 1) {
solution.unshift(1)
remainder = 0
} else if(parseInt(longest[longEnd]) + parseInt(shortest[shortEnd]) + remainder === 0) {
solution.unshift(0)
remainder = 0
}
} else {
if(parseInt(longest[longEnd]) + remainder === 2) {
solution.unshift(0)
remainder = 1
} else if(parseInt(longest[longEnd]) + remainder === 1) {
solution.unshift(1)
remainder = 0
} else {
solution.unshift(longest[longEnd])
}
}
shortEnd--
longEnd--
}
if(remainder === 1) {
solution.unshift(1)
}
console.log(solution)
return solution.join("")
};