Struggling with Codewars time limits - How can I enhance my performance?

Need help improving performance. The error message states "Execution Timed Out (12000 ms)" preventing submission of the solution.

Your task is to create a function that can determine if a given integer n is a perfect number. A perfect number is one where the sum of its divisors (excluding itself) equals the number itself. If it's a perfect number, return True, otherwise return False.

For example, for n = 28, the divisors are: 1, 2, 4, 7, 14, 28. The sum of these divisors equals 28, making it a perfect number. Therefore, you should return True.

function isPerfect(n) {
  let factorSum = 0
  for(let i=1; i<n; i++){
   if(n%i ==0){
    factorSum+=i
  }
}
  return factorSum ===n? true:false
}

Answer №1

Your current algorithm is not efficient enough, you should consider finding a faster approach. When working on code wars challenges, utilizing console.log() can help you identify the optimal solutions. I encountered an issue where I was dealing with numbers around 10^11, which cannot be achieved in O(n) time complexity. Additionally, using bool?true:false is redundant and unnecessary.

Here is a helpful hint for solving the problem:

You only need to iterate from 2 to the square root of n

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