Swap Even Integers Pair

The program must accept N integer as the input. The program swap every two even integers among the N integers. Then the program must print the N modified integers as the output. If the number of even integers is odd the last even integer will remain the same as it has no pair to swap.

Boundary Condition(s):

2<= N <= 1000

1<= Each integer value <= 10^5

Input Format:

The first line contains N.

The Second line contains N integer separated by a space.

Example Input/Output:

Input:

7

22 43 56 51 68 50 28

Output:

56 43 22 51 50 68 28

Explanation:

There are two even integer pairs in the given integers.

The 1st even integer pair is 22 and 56. After swapping, the integers become 56 43 22 51 68 50 28.

The 2nd even integer pair is 68 and 50. After swapping, the integers become 56 43 22 51 50 68 28.

#include<stdio.h>
#include <stdlib.h>
void printevenswap(int arr[],int n)
{
    for(int i=0;i<n;i++)
    {
        printf("%d ",arr[i]);
    }
}
int main()
{
    int n,i,j,fl=0;
    scanf("%d",&n);
    int a[1001];
    for(i=0;i<n;i++)
    {
        scanf("%d ",&a[i]);
    }
    int co=0;
    for(i=0;i<n;i++)
    {
        if(a[i]%2==0)
        {
            fl+=1;
            if(fl==1)
            {co=i;}
            else if(fl==2)
            {
                int sort=a[co];
                a[co]=a[i];
                a[i]=sort;
                fl=0;
                co=0;
            }
        }
    }
    printevenswap(a,n);
}