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1. Open CMD as Administrator

2. Paste the following commands into the Cmd: One by one, follow the order.

 cscript slmgr.vbs /ipk "SERIAL NUMBER HERE"
 
 Replace SERIAL NUMBER HER with any of these, according your Windows 10 installation type.
          Home/Core                            TX9XD-98N7V-6WMQ6-BX7FG-H8Q99        
          Home/Core (Country Specific)         PVMJN-6DFY6-9CCP6-7BKTT-D3WVR  
          Home/Core (Single Language)          7HNRX-D7KGG-3K4RQ-4WPJ4-YTDFH  

Areahints

Setting up http server on android with termux

Setting SSH server

To be able to make all procedures without pain you should have physical keyboard or just install ssh server and connect to your device shell from computer.

Folow this guide to setup ssh server.

Installing needed stuff

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What expression does this meow to?

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QUESTION

We can determine how "out of order" an array A is by counting the number of inversions it has.

Two elements A[i] and A[j] form an inversion if A[i] > A[j] but i < j. That is, a smaller element appears after a larger element.

CHALLENGE

Given an array, count the number of inversions it has. Do this faster than O(N2) time.

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Gary is an avid hiker. He tracks his hikes meticulously, paying close attention to small details like topography. During his last hike he took exactly n steps. For every step he took, he noted if it was an uphill, U, or a downhill, D step. Gary's hikes start and end at sea level and each step up or down represents a unit change in altitude. We define the following terms:

A mountain is a sequence of consecutive steps above sea level, starting with a step up from sea level and ending with a step down to sea level. A valley is a sequence of consecutive steps below sea level, starting with a step down from sea level and ending with a step up to sea level. Given Gary's sequence of up and down steps during his last hike, find and print the number of valleys he walked through.

For example, if Gary's path is s =[DDUUUUDD], he first enters a valley 2 units deep. Then he climbs out an up onto a mountain 2 units high. Finally, he returns to sea level and ends his hike.

Function Description

Areahints

Complete the function solveMeFirst to compute the sum of two integers.

Function prototype:

int solveMeFirst(int a, int b);

where,

• a is the first integer input.

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Compares the two trees defined by Nodes a and b and returns true if they are equal in structure and in value

def compare(a, b):
    if a == b:
        return True
    if a is None or b is None:
        return False
    if a.val != b.val:
        return False