String Leaving Characters - Forward

The program must accept a string S as the input. The program must print the first character, the third character, the sixth character and so on as the output.

Boundary Condition(s):
1 <= Length of S <= 100

Input Format:
The first line contains the string S.

Output Format:
The first line contains the characters of string S as per the given conditions.

Example Input/Output 1:
Input:
abcdefghijklmno

Output:
acfjo

Explanation:
1st character is a.
3rd character is c.
6th character is f.
10th character is j.
15th character is o.
So these characters are printed as the output.

Example Input/Output 2:
Input:
northeastwestsouth

Output:
nrewo

Solution :-

#include<stdio.h>

#include <stdlib.h>

int main()

{

    char a[100];

    scanf("%s",a);

    int x=2;

    

    for(int i=0;i<strlen(a);)

    {

        

        printf("%c",a[i]);

        i=i+x;

        x++;

        

    }

    

}