# Create a new string by alternately combining the characters of two halves of the string in reverse

Given a string s, create a new string such that it contains the characters of the two halves of the string s combined alternately in reverse order.

Examples:

```Input : s = carbohydrates
Output : hsoebtraarcdy

Input : s = sunshine
Output : sennuish
```

Explanation:
Example 1: Two halves of the string carbohydrate are carboh and ydrates. As they needed to be added in reverse alternately, start with h from first half then s from second half followed by o from first half, e from second half and so on. The string p comes out to be hsoebtraarcdy. If one of the string is completely finished then simply add the remaining characters of the other string in reverse order.
Example 2: The two halves of the string are suns and hine. String sennuish is the desired string p.

## C++

 `// C++ program for creating a string  ` `// by alternately combining the ` `// characters of two halves  ` `// in reverse  ` `#include ` `using` `namespace` `std; ` ` `  `// Function performing calculations ` `void` `solve(string s) ` `{ ` `    ``int` `l = s.length(); ` `    ``int` `x = l / 2; ` `    ``int` `y = l; ` `     `  `    ``// Calculating the two halves ` `    ``// of string s as first and  ` `    ``// second. The final string p ` `    ``string p = ``""``; ` `    ``while` `(x > 0 && y > l / 2) { ` `         `  `        ``// It joins the characters to ` `        ``// final string in reverse order ` `        ``p += s[x - 1]; ` `        ``x--; ` `         `  `        ``// It joins the characters to ` `        ``// final string in reverse order ` `        ``p += s[y - 1]; ` `        ``y--; ` `    ``} ` `     `  `    ``if` `(y > l / 2) { ` `        ``p += s[y - 1]; ` `        ``y--; ` `    ``} ` `     `  `    ``cout << p; ` `} ` ` `  `// Driver code ` `int` `main() ` `{ ` `    ``string s = ``"sunshine"``; ` `     `  `    ``// Calling function ` `    ``solve(s); ` `    ``return` `0; ` `} `

## Java

 `// Java program for creating a string  ` `// by alternately combining the ` `// characters of two halves  ` `// in reverse  ` `import` `java.io.*; ` ` `  `class` `GFG { ` `     `  `    ``// Function performing calculations ` `    ``public` `static` `void` `solve(String s) ` `    ``{ ` `        ``int` `l = s.length(); ` `        ``int` `x = l / ``2``; ` `        ``int` `y = l; ` `     `  `        ``// Calculating the two halves of  ` `        ``// string s as first and second ` `        ``// The final string p ` `        ``String p = ``""``; ` `        ``while` `(x > ``0` `&& y > l / ``2``) { ` `         `  `            ``// It joins the characters to ` `            ``// final string in reverse order ` `            ``char` `ch = s.charAt(x - ``1``); ` `            ``p += ch; ` `            ``x--; ` `             `  `            ``// It joins the characters to ` `            ``// final string in reverse order ` `            ``ch = s.charAt(y - ``1``); ` `            ``p += ch; ` `            ``y--; ` `        ``} ` `         `  `        ``if` `(y > l / ``2``) { ` `            ``char` `ch = s.charAt(x - ``1``); ` `            ``p += ch; ` `            ``y--; ` `        ``} ` `        ``System.out.println(p); ` `    ``} ` `     `  `    ``// Driver method ` `    ``public` `static` `void` `main(String args[]) ` `    ``{ ` `        ``String s = ``"sunshine"``; ` `         `  `        ``// Calling function ` `        ``solve(s); ` `    ``} ` `} `

## Python3

 `# Python 3 program for creating a string  ` `# by alternately combining the ` `# characters of two halves  ` `# in reverse  ` ` `  `# Function performing calculations ` `def` `solve(s) : ` `    ``l ``=` `len``(s) ` `    ``x ``=` `l ``/``/` `2` `    ``y ``=` `l ` `      `  `    ``# Calculating the two halves ` `    ``# of string s as first and  ` `    ``# second. The final string p ` `    ``p ``=` `"" ` `    ``while` `(x > ``0` `and` `y > l ``/` `2``) : ` ` `  `        ``# It joins the characters to ` `        ``# final string in reverse order ` `        ``p ``=`  `p ``+` `s[x ``-` `1``] ` `        ``x ``=` `x ``-` `1` `          `  `        ``# It joins the characters to ` `        ``# final string in reverse order ` `        ``p ``=` `p ``+` `s[y ``-` `1``] ` `        ``y ``=` `y ``-` `1` `     `  `      `  `    ``if` `(y > l ``/``/` `2``) : ` `        ``p ``=` `p ``+` `s[y ``-` `1``] ` `        ``y ``=` `y ``-` `1` `     `  `    ``print` `(p) ` ` `  `# Driver code ` `s ``=` `"sunshine"` ` `  `# Calling function ` `solve(s) ` ` `  ` `  `# This code is contributed by Nikita Tiwari `

## C#

 `// C# program for creating a string  ` `// by alternately combining the ` `// characters of two halves  ` `// in reverse  ` `using` `System; ` ` `  `class` `GFG { ` `     `  `    ``// Function performing calculations ` `    ``public` `static` `void` `solve(``string` `s) ` `    ``{ ` `        ``int` `l = s.Length; ` `        ``int` `x = l / 2; ` `        ``int` `y = l; ` `     `  `        ``// Calculating the two halves of  ` `        ``// string s as first and second ` `        ``// The final string p ` `        ``string` `p = ``""``; ` `        ``while` `(x > 0 && y > l / 2) { ` `         `  `            ``// It joins the characters to ` `            ``// final string in reverse order ` `            ``char` `ch = s[x - 1]; ` `            ``p += ch; ` `            ``x--; ` `             `  `            ``// It joins the characters to ` `            ``// final string in reverse order ` `            ``ch = s[y - 1]; ` `            ``p += ch; ` `            ``y--; ` `        ``} ` `         `  `        ``if` `(y > l / 2) ` `        ``{ ` `            ``char` `ch = s[x - 1]; ` `            ``p += ch; ` `            ``y--; ` `        ``} ` `        ``Console.WriteLine(p); ` `    ``} ` `     `  `    ``// Driver method ` `    ``public` `static` `void` `Main() ` `    ``{ ` `        ``string` `s = ``"sunshine"``; ` `         `  `        ``// Calling function ` `        ``solve(s); ` `    ``} ` `} ` `// This code is contributed by vt_m. `

## PHP

 ` 0 && ``\$y` `> ``\$l` `/ 2)  ` `    ``{ ` `         `  `        ``// It joins the characters to ` `        ``// final string in reverse order ` `        ``\$p` `= ``\$p``.``\$s``[``\$x` `- 1]; ` `        ``\$x``--; ` `         `  `        ``// It joins the characters to ` `        ``// final string in reverse order ` `        ``\$p` `= ``\$p``.``\$s``[``\$y` `- 1]; ` `        ``\$y``--; ` `    ``} ` `     `  `    ``if` `(``\$y` `> ``\$l` `/ 2)  ` `    ``{ ` `        ``\$p` `= ``\$p``.``\$s``[``\$y` `- 1]; ` `        ``\$y``--; ` `    ``} ` `     `  `    ``echo` `\$p``; ` `} ` ` `  `// Driver code ` `\$s` `= ``"sunshine"``; ` `     `  `// Calling function ` `solve(``\$s``); ` ` `  `// This code is contributed ` `// by ChitraNayal ` `?> `

Output:

```sennuish
```

GeeksforGeeks has prepared a complete interview preparation course with premium videos, theory, practice problems, TA support and many more features. Please refer Placement 100 for details

My Personal Notes arrow_drop_up

Check out this Author's contributed articles.

If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute.geeksforgeeks.org or mail your article to contribute@geeksforgeeks.org. See your article appearing on the GeeksforGeeks main page and help other Geeks.

Please Improve this article if you find anything incorrect by clicking on the "Improve Article" button below.

Improved By : chitranayal, Akanksha_Rai

Article Tags :
Practice Tags :

1

Please write to us at contribute@geeksforgeeks.org to report any issue with the above content.