# Find the count of maximum contiguous Even numbers

Given an array arr[] of N elements. The task is to find the maximum number of the contiguous even numbers in the given array.

Examples:

Input: arr[] = {1, 2, 3, 4, 6, 7}
Output: 2
Maximum contiguous even number sequence is {4, 6}

Input: arr[] = {1, 0, 2, 4, 3, 8, 9}
Output: 3
Maximum contiguous even number sequence is {0, 2, 4}

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

Approach: The idea is to keep traversing the array with two count variables named current_max and max_so_far. If an even number is found then increment current_max and compare it with max_so_far. Every time an odd element is found reset current_max to 0.

Below is the implementation of the above approach:

## C++

 `// CPP program to count maximum ` `// contiguous even numbers ` ` `  `#include ` `using` `namespace` `std; ` ` `  `// Function to count maximum ` `// contiguous even numbers ` `int` `countMaxContiguous(``int` `arr[], ``int` `n) ` `{ ` `    ``int` `current_max = 0, max_so_far = 0; ` ` `  `    ``for` `(``int` `i = 0; i < n; i++) { ` ` `  `        ``// If current element is not even ` `        ``// reset current_max ` `        ``if` `(arr[i] % 2 != 0) ` `            ``current_max = 0; ` ` `  `        ``// If even element is found, increment ` `        ``// current_max and update result if ` `        ``// count becomes more ` `        ``else` `{ ` `            ``current_max++; ``// increase count ` `            ``max_so_far = max(current_max, max_so_far); ` `        ``} ` `    ``} ` ` `  `    ``return` `max_so_far; ` `} ` ` `  `// Driver code ` `int` `main() ` `{ ` `    ``int` `arr[] = { 1, 0, 2, 4, 3, 8, 9 }; ` ` `  `    ``int` `n = ``sizeof``(arr) / ``sizeof``(arr); ` ` `  `    ``cout << countMaxContiguous(arr, n); ` ` `  `    ``return` `0; ` `} `

## Java

 `// Java program to count maximum ` `// contiguous even numbers ` `import` `java.io.*; ` ` `  `class` `GFG ` `{ ` ` `  `// Function to count maximum ` `// contiguous even numbers ` `static` `int` `countMaxContiguous(``int` `arr[], ``int` `n) ` `{ ` `    ``int` `current_max = ``0``, max_so_far = ``0``; ` ` `  `    ``for` `(``int` `i = ``0``; i < n; i++) ` `    ``{ ` ` `  `        ``// If current element is not  ` `        ``// even reset current_max ` `        ``if` `(arr[i] % ``2` `!= ``0``) ` `            ``current_max = ``0``; ` ` `  `        ``// If even element is found, increment ` `        ``// current_max and update result if ` `        ``// count becomes more ` `        ``else` `        ``{ ` `            ``current_max++; ``// increase count ` `            ``max_so_far = Math.max(current_max,  ` `                                  ``max_so_far); ` `        ``} ` `    ``} ` ` `  `    ``return` `max_so_far; ` `} ` ` `  `// Driver code ` `public` `static` `void` `main (String[] args)  ` `{ ` `    ``int` `arr[] = { ``1``, ``0``, ``2``, ``4``, ``3``, ``8``, ``9` `}; ` `     `  `    ``int` `n = arr.length; ` `     `  `    ``System.out.println(countMaxContiguous(arr, n)); ` `} ` `} ` ` `  `// This code is contributed ` `// by inder_verma `

## Python 3

 `# Python 3 program to count maximum ` `# contiguous even numbers ` ` `  `# Function to count maximum ` `# contiguous even numbers ` `def` `countMaxContiguous(arr, n): ` ` `  `    ``current_max ``=` `0` `    ``max_so_far ``=` `0` ` `  `    ``for` `i ``in` `range``(n) : ` ` `  `        ``# If current element is not ` `        ``# even reset current_max ` `        ``if` `(arr[i] ``%` `2` `!``=` `0``): ` `            ``current_max ``=` `0` ` `  `        ``# If even element is found, ` `        ``# increment current_max and  ` `        ``# update result if count  ` `        ``# becomes more ` `        ``else` `: ` `            ``current_max ``+``=` `1` `# increase count ` `            ``max_so_far ``=` `max``(current_max,  ` `                             ``max_so_far) ` ` `  `    ``return` `max_so_far ` ` `  `# Driver code ` `if` `__name__ ``=``=` `"__main__"``: ` `     `  `    ``arr ``=` `[ ``1``, ``0``, ``2``, ``4``, ``3``, ``8``, ``9` `] ` ` `  `    ``n ``=` `len``(arr) ` ` `  `    ``print``(countMaxContiguous(arr, n)) ` ` `  `# This code is contributed ` `# by ChitraNayal `

## C#

 `// C# program to count maximum ` `// contiguous even numbers ` `using` `System; ` ` `  `class` `GFG ` `{ ` ` `  `// Function to count maximum ` `// contiguous even numbers ` `static` `int` `countMaxContiguous(``int` `[]arr, ``int` `n) ` `{ ` `    ``int` `current_max = 0, max_so_far = 0; ` ` `  `    ``for` `(``int` `i = 0; i < n; i++) ` `    ``{ ` ` `  `        ``// If current element is not  ` `        ``// even reset current_max ` `        ``if` `(arr[i] % 2 != 0) ` `            ``current_max = 0; ` ` `  `        ``// If even element is found, increment ` `        ``// current_max and update result if ` `        ``// count becomes more ` `        ``else` `        ``{ ` `            ``current_max++; ``// increase count ` `            ``max_so_far = Math.Max(current_max,  ` `                                ``max_so_far); ` `        ``} ` `    ``} ` ` `  `    ``return` `max_so_far; ` `} ` ` `  `// Driver code ` `public` `static` `void` `Main ()  ` `{ ` `    ``int` `[]arr = { 1, 0, 2, 4, 3, 8, 9 }; ` `      ``int` `n = arr.Length; ` `     `  `    ``Console.WriteLine(countMaxContiguous(arr, n)); ` `} ` `} ` ` `  `// This code is contributed ` `// by inder_verma `

## PHP

 ` `

Output:

```3
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