Big data Analyst

Given an array "prices". In "prices" the ith element is the price of the stock on the ith day. Your task is to find maximum profit at the end of the ith day. You may complete at max 2 transactions.

You can perform a transition with these conditions -

1. Not allowed to engage in more than 1 transaction at a time, which means if you have bought stock then you can buy another stock before selling the first stock.

2. If you bought a stock at ‘X’ price and sold it at ‘Y’ price then the profits ‘Y - X’.

Note:

It is not compulsory to perform an exact '2' transaction.

You are given an array ARR having N integers. Your task is to find the sum of Hamming Distance for each pair of the array elements.

Hamming Distance for two given integers 'A' and 'B' is defined as the minimum number of bits that needs to be toggled to make both the integers equal.

For example:

Consider A=4 and B=7
Binary representation of 4 = 100
Binary representation of 7 = 111
For the given example, if we flip the values of the last two least significant bits of A to 1 then A will become 7. As we can change the value of A to B by 2 flips. Therefore the Hamming Distance, in this case, is 2.

You are given an array 'a' of size 'n'.

Print the Next Greater Element(NGE) for every element.

The Next Greater Element for an element 'x' is the first element on the right side of 'x' in the array, which is greater than 'x'.

If no greater elements exist to the right of 'x', consider the next greater element as -1.

For example:

Input: 'a' = [7, 12, 1, 20]

Output: NGE = [12, 20, 20, -1]

Explanation: For the given array,

- The next greater element for 7 is 12.

- The next greater element for 12 is 20. 

- The next greater element for 1 is 20. 

- There is no greater element for 20 on the right side. So we consider NGE as -1.

You have been given a Binary Tree of 'n' nodes, where the nodes have integer values

Print the left view of the binary tree.

Example :

If the input tree is as depicted in the picture: 

The Left View of the tree will be:  2 35 2 

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