To create a Fenwick Tree, we need to initialize an array of size n+1, where n is the size of the input array. This extra space is used to store the prefix sums. The Fenwick Tree can be seen as a binary indexed tree, with each index representing a range of elements.

The initialization process involves setting all elements of the Fenwick Tree array to 0. This can be done using a for loop or using the memset function in C++.

1#include <iostream>
2#include <cstring>
3using namespace std;
4
5const int MAX_SIZE = 100;
6int BIT[MAX_SIZE];
7
8void initialize() {
9  memset(BIT, 0, sizeof(BIT));
10}
11
12int main() {
13  initialize();
14  // Your Fenwick Tree logic
15  return 0;
16}