# Empty an Array by removing maximum of K value from it

Given an array arr of size N and a value K, the task is to empty this array by removing maximum of K from it. Print the value removed if the array was emptied, else -1.

Examples:

Input: arr[] = {2, 2}, K = 5
Output: 4
Explanation:
After removing arr (=2) from K (=5), K = 5 – 2 = 3
After removing arr (=2) from K (=3), K = 3 – 2 = 1
Since the array has been emptied and K is still > 0
Therefore the value removed = 2 + 2 = 4

Input: arr[] = {5, 3, 2, 2}, K = 10
Output: -1
Explanation:
After removing arr (=5) from K (=10), K = 10 – 5 = 5
After removing arr (=3) from K (=5), K = 5 – 3 = 2
After removing arr (=2) from K (=2), K = 2 – 2 = 0
After removing arr (=2) from K (=0), K = 0 – 2 = -2
Since the array has been emptied and K is < 0
Therefore the array cannot be emptied for this K
hence the output is -1

## Recommended: Please try your approach on {IDE} first, before moving on to the solution.

Approach:

• The given problem can be observed as finding the total sum of the array arr and removing this sum from K.
• If this sum is less than or equal to K, then the array can be emptied and the output will be the sum of the array.
• Else the output will be -1.

Below is the implementation of the above approach:

## C++

 `// C++ program to empty an Array ` `// by removing a maximum of K value from it ` ` `  `#include ` `using` `namespace` `std; ` ` `  `// Function to Empty an Array by removing ` `// maximum of K value from it ` `void` `emptyArray(``long` `long` `int` `n, ` `                ``long` `long` `int` `k, ` `                ``long` `long` `int` `arr[]) ` `{ ` `    ``long` `long` `int` `sum = 0, i; ` ` `  `    ``// Find the total sum of the array ` `    ``for` `(i = 0; i < n; i++) ` `        ``sum += arr[i]; ` ` `  `    ``// Find if sum is less than or equal to K ` `    ``if` `(sum <= k) ` `        ``cout << sum << ``"\n"``; ` `    ``else` `        ``cout << -1 << ``"\n"``; ` `} ` ` `  `// Driver code ` `int` `main() ` `{ ` ` `  `    ``long` `long` `int` `n = 2, k = 5; ` `    ``long` `long` `int` `arr[] = { 2, 2 }; ` ` `  `    ``emptyArray(n, k, arr); ` ` `  `    ``n = 4, k = 10; ` `    ``long` `long` `int` `arr1[] = { 5, 3, 2, 2 }; ` ` `  `    ``emptyArray(n, k, arr1); ` ` `  `    ``return` `0; ` `} `

## Java

 `// Java program to empty an Array  ` `// by removing a maximum of K value from it  ` `class` `GFG  ` `{ ` `     `  `    ``// Function to Empty an Array by removing  ` `    ``// maximum of K value from it  ` `    ``static` `void` `emptyArray(``int` `n, ``int` `k, ``int` `arr[])  ` `    ``{  ` `        ``int` `sum = ``0``, i;  ` `     `  `        ``// Find the total sum of the array  ` `        ``for` `(i = ``0``; i < n; i++)  ` `            ``sum += arr[i];  ` `     `  `        ``// Find if sum is less than or equal to K  ` `        ``if` `(sum <= k)  ` `            ``System.out.println(sum);  ` `        ``else` `            ``System.out.println(-``1``);  ` `    ``}  ` `     `  `    ``// Driver code  ` `    ``public` `static` `void` `main (String[] args)  ` `    ``{  ` `        ``int` `n = ``2``;  ` `        ``int` `k = ``5``;  ` `        ``int` `arr[] = { ``2``, ``2` `};  ` `     `  `        ``emptyArray(n, k, arr);  ` `     `  `        ``n = ``4``; k = ``10``;  ` `        ``int` `arr1[] = { ``5``, ``3``, ``2``, ``2` `};  ` `     `  `        ``emptyArray(n, k, arr1);  ` `    ``}  ` `} ` ` `  `// This code is contributed by AnkitRai01 `

## Python3

 `# Python program to empty an Array  ` `# by removing a maximum of K value from it  ` ` `  `# Function to Empty an Array by removing  ` `# maximum of K value from it  ` `def` `emptyArray(n, k, arr) :  ` ` `  `    ``sum` `=` `0``;  ` ` `  `    ``# Find the total sum of the array  ` `    ``for` `i ``in` `range``(n) : ` `        ``sum` `+``=` `arr[i];  ` ` `  `    ``# Find if sum is less than or equal to K  ` `    ``if` `(``sum` `<``=` `k) :  ` `        ``print``(``sum``);  ` `    ``else` `: ` `        ``print``(``-``1``);  ` ` `  `# Driver code  ` `if` `__name__ ``=``=` `"__main__"` `:  ` ` `  `    ``n ``=` `2``; k ``=` `5``;  ` `    ``arr ``=` `[ ``2``, ``2` `];  ` ` `  `    ``emptyArray(n, k, arr);  ` ` `  `    ``n ``=` `4``; k ``=` `10``;  ` `    ``arr1 ``=` `[ ``5``, ``3``, ``2``, ``2` `];  ` ` `  `    ``emptyArray(n, k, arr1);  ` ` `  `# This code is contributed by AnkitRai01 `

## C#

 `// C# program to empty an Array  ` `// by removing a maximum of K value from it  ` `using` `System; ` ` `  `class` `GFG  ` `{ ` `     `  `    ``// Function to Empty an Array by removing  ` `    ``// maximum of K value from it  ` `    ``static` `void` `emptyArray(``int` `n, ``int` `k, ``int` `[]arr)  ` `    ``{  ` `        ``int` `sum = 0, i;  ` `     `  `        ``// Find the total sum of the array  ` `        ``for` `(i = 0; i < n; i++)  ` `            ``sum += arr[i];  ` `     `  `        ``// Find if sum is less than or equal to K  ` `        ``if` `(sum <= k)  ` `            ``Console.WriteLine(sum);  ` `        ``else` `            ``Console.WriteLine(-1);  ` `    ``}  ` `     `  `    ``// Driver code  ` `    ``public` `static` `void` `Main(String[] args)  ` `    ``{  ` `        ``int` `n = 2;  ` `        ``int` `k = 5;  ` `        ``int` `[]arr = { 2, 2 };  ` `     `  `        ``emptyArray(n, k, arr);  ` `     `  `        ``n = 4; k = 10;  ` `        ``int` `[]arr1 = { 5, 3, 2, 2 };  ` `     `  `        ``emptyArray(n, k, arr1);  ` `    ``}  ` `} ` ` `  `// This code is contributed by PrinciRaj1992 `

Output:

```4
-1
```

Attention reader! Don’t stop learning now. Get hold of all the important DSA concepts with the DSA Self Paced Course at a student-friendly price and become industry ready.

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 : AnkitRai01, princiraj1992

Article Tags :
Practice Tags :

Be the First to upvote.

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