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You are given a string 'str' of length 'N'.

Your task is to reverse the original string word by word.

There can be multiple spaces between two words and there can be leading or trailing spaces but in the output reversed string you need to put a single space between two words, and your reversed string should not contain leading or trailing spaces.

Example :

If the given input string is "Welcome to Coding Ninjas", then you should return "Ninjas Coding to Welcome" as the reversed string has only a single space between two words and there is no leading or trailing space.

You are given a cartesian plane, having ‘N’ points in the form of the array ‘PointX’ and ‘PointY’ where ‘PointX[i]’ and ‘PointY[i]’ represent the ‘X’ coordinates and ‘Y’ coordinates of the i’th point, respectively. You have to find the number of pairs satisfying the following conditions:

1. The points in the pair are distinct.
2. Euclidean distance and the Manhattan distance between the points of the pair should be equal.

Note :

1. Pair (‘P’, ‘Q’) is the same as pair (‘Q’, ‘P’).
2. Euclidean distance is given by: (( ‘X2’ - ‘X1’) ^ 2 + (‘Y2’ - ‘Y1’) ^ 2) ^ 0.5.
3. Manhattan distance is given by: |’X2’ - ‘X1’| + |’Y2’ - ‘Y1’|, where points are (‘X1’, ‘Y1’) and (‘X2’, ‘Y2’).

For example :

Let points be: (1, 2), (2, 3), (1, 3)
The Euclidean distance between points (1, 2) and (1, 3) is: 1
The Manhattan distance between points (1, 2) and (1, 3) is: 1
The Euclidean distance between points (2, 3) and (1, 3) is: 1
The Manhattan distance between points (2, 3) and (1, 3) is: 1
So the pairs can be: [(1, 2), (1, 3)] and [(2, 3), (1, 3)].
So the number of pairs is 2.

Remove duplicates in a given array without inbuilt methods

Create a timer displaying 10-1 and a Happy New Year wish.