Software Developer

This time our favorite Ninja wants to buy a house. But they are unable to count the number of rooms in the house. So they need your help to count the number of rooms.

Note:

A house is represented by a matrix where “\” and “/” represent a wall and blank space is empty space. We will consider two rooms different if we will be unable to reach another room.

Your task is to return the number of rooms. For a better explanation, see the example.

Example:

Input: 
[
  “ /”
  “/\”
]

Output: 3

Explanation: 2 X 2 house is shown below:

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 string 's', and a dictionary of words 'dict' containing 'n' words. Your task is to add spaces in 's' to form valid sentences, where each word is a word from the dictionary.

You need to return all possible sentences that can be formed using the given dictionary.

Note :

The same word from a dictionary can be used as many times as possible to make sentences.

What do you get in the Java download file? How do they differ from one another?
Will the program run if we write static public void main?
What do you mean by aggregation?

Introduce yourself

What makes you happy? 

How do you work under pressure? Can you handle the pressure? 

Are you willing to relocate or travel?