# Array Mathematics Python

### Problem Statement :

```Basic mathematical functions operate element-wise on arrays. They are available both as operator overloads and as functions in the NumPy module.

import numpy

a = numpy.array([1,2,3,4], float)
b = numpy.array([5,6,7,8], float)

print a + b                     #[  6.   8.  10.  12.]
print numpy.add(a, b)           #[  6.   8.  10.  12.]

print a - b                     #[-4. -4. -4. -4.]
print numpy.subtract(a, b)      #[-4. -4. -4. -4.]

print a * b                     #[  5.  12.  21.  32.]
print numpy.multiply(a, b)      #[  5.  12.  21.  32.]

print a / b                     #[ 0.2         0.33333333  0.42857143  0.5       ]
print numpy.divide(a, b)        #[ 0.2         0.33333333  0.42857143  0.5       ]

print a % b                     #[ 1.  2.  3.  4.]
print numpy.mod(a, b)           #[ 1.  2.  3.  4.]

print a**b                      #[  1.00000000e+00   6.40000000e+01   2.18700000e+03   6.55360000e+04]
print numpy.power(a, b)         #[  1.00000000e+00   6.40000000e+01   2.18700000e+03   6.55360000e+04]

You are given two integer arrays, A and B of dimensions N X M.
Your task is to perform the following operations:

Add (A + B )
Subtract (A - B)
Multiply ( A * B )
Integer Division (A / B )
Mod ( A % B )
Power ( A ** B )

Note
There is a method numpy.floor_divide() that works like numpy.divide() except it performs a floor division.

Input Format

The first line contains two space separated integers, N and M.
The next N lines contains  space separated integers of array A.
The following M lines contains  space separated integers of array B.

Output Format

Print the result of each operation in the given order under Task.```

### Solution :

```                            ```Solution in C :

import numpy as np
n,m=map(int,input().split())
a=np.empty(shape=(n,m),dtype=int)
b=np.empty(shape=(n,m),dtype=int)
for i in range(n):
a[i]=input().split()
for i in range(n):
b[i]=input().split()
print(np.subtract(a,b))
print(np.multiply(a,b))
print(a//b)
print(np.mod(a,b))
print(np.power(a,b))```
```

## Inserting a Node Into a Sorted Doubly Linked List

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## Reverse a doubly linked list

This challenge is part of a tutorial track by MyCodeSchool Given the pointer to the head node of a doubly linked list, reverse the order of the nodes in place. That is, change the next and prev pointers of the nodes so that the direction of the list is reversed. Return a reference to the head node of the reversed list. Note: The head node might be NULL to indicate that the list is empty.

## Tree: Preorder Traversal

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## Tree: Postorder Traversal

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## Tree: Inorder Traversal

In this challenge, you are required to implement inorder traversal of a tree. Complete the inorder function in your editor below, which has 1 parameter: a pointer to the root of a binary tree. It must print the values in the tree's inorder traversal as a single line of space-separated values. Input Format Our hidden tester code passes the root node of a binary tree to your \$inOrder* func

## Tree: Height of a Binary Tree

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