查找最大连续偶数的计数

给定N个元素的数组arr [] 。任务是找到给定数组中连续偶数的最大数量。
例子：

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} 
 

方法：想法是继续使用两个名为current_max和max_so_far的计数变量遍历数组。如果找到偶数，则增加current_max并将其与max_so_far进行比较。每次发现奇数元素时，将current_max重置为0。
下面是上述方法的实现：

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[0]);
 
    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

Javascript

 
// Javascript program to count maximum
// contiguous even numbers
 
// Function to count maximum
// contiguous even numbers
function countMaxContiguous(arr, n)
{
    let current_max = 0, max_so_far = 0;
 
    for (let 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
 
    let arr = [ 1, 0, 2, 4, 3, 8, 9 ];
 
    let n = arr.length;
 
    document.write(countMaxContiguous(arr, n));
 
 
// This code is contributed by Mayank Tyagi
 

输出：

3

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