I was working on a problem that determines whether the digits in the numbers are in the increasing sequence. Now, the approach I took to solve the problem was, For instance, consider the number 5678.

## How to do binary search by table with known data order in specific fields SQL

I have a table with structure like this:it didn't have an index by datetime, but i know that dt non-decreasing sequence. I need to query data from this table with specific condition by date field like this:

## Binary vs Linear searches for unsorted N elements

I try to understand a formula when we should use quicksort. For instance, we have an array with N = 1_000_000 elements. If we will search only once, we should use a simple linear search, but if we'll do it 10 times we should use sort array O(n log n)....

## Minimum number of AND operations to make all array elements zero

I came across this question in a programming contest:We are given an array consisting of n elements. At each iteration, you can select any two elements ai and aj and replace ai with ai & aj. & is the bitwise AND operator. Find the minimum number of AND operations needed...

## Find the largest multiple of n lower than x

What would be the more pythonic way to find the largest number multiple of n but lower than an upperbound x?

## How to find an element in a specified range in std::map?

Is there an equivalent version of std::find(first, last) but for a std::map? I.e., is there a version of std::map's find method that searches for an element in a map, but restricting the search only to a specified [first, last) range? Ideally, the solution should be logarithmic in the size of...

## Fast modulo 12 algorithm for 4 uint16_t's packed in a uint64_t

Consider the following union:Is there a fast algorithm for determining whether each component equals 1 modulo 12 or not?

## How to code these conditional statements in more elegant & scalable manner

In my software, I need to decide the version of a feature based on 2 parameters. Eg. So, to meet this requirement, I wrote a code which looks like this -

## How to find all partitions of a multiset, where each part has distinct elements?

Let's say we have such an array: myArray = [A, A, B, B, C, C, D, E]I would like to create an algorithm so that it will find all the combinations that add up to the whole array, where none of the elements are repeated.