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say hello world with C++ - Solution in Hacker Rank - hackerranksolutions8

  Objective This is a simple challenge to help you practice printing to  stdout . You may also want to complete  Solve Me First  in C++ before attempting this challenge. We’re starting out by printing the most famous computing phrase of all time! In the editor below, use either  printf  or  cout  to print the string  Hello ,World!  to  stdout . The more popular command form is  cout . It has the following basic form: cout<<value_to_print<<value_to_print; Any number of values can be printed using one command as shown. The  printf  command comes from C language. It accepts an optional format specification and a list of variables. Two examples for printing a string are: printf("%s", string);   printf(string); Note that neither method adds a newline. It only prints what you tell it to. Output Format Print   Hello ,World!   to stdout. Sample Output Hello, World! Solution:- //Say Hello, ...
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Permutations of Strings in C Hackerrank Solution

 Strings are usually ordered in lexicographical order. That means they are ordered by comparing their leftmost different characters. For example, abc < abd  because c < d . Also z>yyy because z > y. If one string is an exact prefix of the other it is lexicographically smaller, e.g., gh < ghij .

Given an array of strings sorted in lexicographical order, print all of its permutations in strict lexicographical order. If two permutations look the same, only print one of them. See the ‘note’ below for an example.

Complete the function next_permutation which generates the permutations in the described order.

For example, s = [ab,bc,cd] . The six permutations in correct order are:

ab bc cd
ab cd bc
bc ab cd
bc cd ab
cd ab bc
cd bc ab

Note: There may be two or more of the same string as elements of s .
For example,  s = [ab,bc,cd] . Only one instance of a permutation where all elements match should be printed. In other words, if s[0]==s[1] , then print either  s[0] s[1] or s[1] s[0] but not both.

A three element array having three distinct elements has six permutations as shown above. In this case, there are three matching pairs of permutations where  s[0] = ab   and   s[1] = ab  are switched. We only print the three visibly unique permutations:

ab ab bc
ab bc ab
bc ab ab

Input Format

The first line of each test file contains a single integer , the length of the string array .

Each of the next  lines contains a string 

Output Format

Print each permutation as a list of space-separated strings on a single line.

Sample Input 0

2
ab
cd

Sample Output 0

ab cd
cd ab

Sample Input 1

3
a
bc
bc

Sample Output 1

a bc bc
bc a bc
bc bc a

Explanation 1

This is similar to the note above. Only three of the six permutations are printed to avoid redundancy in output.


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