Professor says this isn't a efficient algorithm to check whether the number is divisible by a number from 100,000-150,000. I'm having trouble finding a better way. Any help would be appreciated.

## Double sum optimization

Recently I got this question in one of my interviews, which I unfortunately skipped, but I'm very curious to get the answer. Can you help me?

## ArrayList.sort() vs PriorityQueue [duplicate]

This question already has an answer here:I need to support a more inserts than reads and keep the data sorted. Which would be better performing:

## How to check parentheses validation [duplicate]

This question already has an answer here:I want to be able to get string and check if the Parentheses are valid.

## What is that optimization algorithm called?

I've got a piece of undocumented code, which I have to understand to fix an error. The following method is called optimization and it is supposed to find the maximum of a very complex function f. Unfortunately, it fails under some circumstances (i.e. it reaches the "Max iteration reached" line).

## Turning a recursive function into an iterative function

I have written the following recursive function, but am incurring a runtime error due to maximum recursion depth. I was wondering is it possible to write an iterative function to overcome this:

## Make coordinates be attracted/repulsed to/from certain other coordinates

I am generating a couple of svg images like this one: <svg version="1.1" viewBox="0 0 1024 1024" xmlns="http://www.w3.org/2000/svg"> <style type="text/css"> text { font-family: Helvetica; font-size: 60px; paint-order: stroke; stroke: #000000; stroke-width: 6px; stroke-linecap: butt; stroke-linejoin: miter; font-weight: 800; } </style> <g stroke="lightgray" stroke-dasharray="1,1" stroke-width="1" transform="scale(4, 4)"> <line x1="0" y1="0" x2="256"...

## Given an array, you have to find the max possible two equal sum

Given an array, you have to find the max possible two equal sum, you can exclude elements.i.e 1,2,3,4,6 is given array we can have max two equal sum as 6+2 = 4+3+1

## Generate a list a(n) is not of the form prime + a(k), k < n

How to generate this list in Python? a(n) is not of the form prime + a(k), k < n.Here is the list on oeis http://oeis.org/A025043

## merge array with unique keys

I have array of objects called newArray and oldArray.Like this : [{name: 'abc', label: 'abclabel', values: [1,2,3,4,5]}]