A Derangement is a permutation of n elements, such that no element appears in its origin For example, a derangement of (0, 1, 2, 3) is {2, 3, 1, 0). Given a number n, find the total number of Derangements of a set of n elements. Input Specification: input1: N, the number of Objects Output Specification: Return the number of arrangements in which no object occurs at its original

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Q: Describe the C++ looping structures.

A:

Q: explain the concept of dynamic variables in C++.

A: explain the concept of dynamic variables in C++.

Q: i need this code in C++

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Merge sort

Merge Sort recursively sorts a given collection of numbers or elements by using the divide and conquer strategy in less time. It is one of the most used algorithms, with the worst-case time complexity of O (n log n). It was invented by John Von Neumann. The algorithm continuously divides an array into sub-arrays until each sub-array consists of a single element. It then merges those sub-arrays to produce a sorted array.