TCS NINJA CODING Season-2

C program to print Nth number in a series

To find Nth number in series of 

0 0 1 2 2 4 3 6 4 8 5  ........................
The above series even index contains whole numbers and odd index contains even numbers.

When given Nth index number the number at that position is to be printed.
Input:
First line of input contains Nth index number
Output:
Number at Nth index should be printed

Example:

Input:

10
Output:
5
Explanation:
In the above example
When we enter 10 index number then at that 10 index number 5 is present.
0 0 1 2 2 4 3 6 4 8 5

SOURCE CODE:
#include<stdio.h>
int main()
{
    int n,i,j,e=0,od=0,k;
    long int a[10000]={0};
    scanf("%d",&n);
 
    for(i=2;i<=n;)
    {
        if(i%2==0)
        {
            e=e+1;
            a[i]=e;
        }
        else
        {
            od=od+2;
            a[i]=od;
        }
        i++;
    }
    for(i=0;i<=n;i++)
    {
       if(i==n)
        printf("%d ",a[i]);
    }
    return 0;

}