Alternate

• Problem Description

  
  There is a machine in a lab which is working not properly. It displays the alternative elements in a set of input. The lab instructor asked the students to write a C Program for this scenario. i.e. to Print the Alternate Elements in an Array
  

• Test Case 1

  
  Input (stdin)

  5
  
  21 8 41 13 15
  
  

  Expected Output

  21 41 15

• Test Case 2

  
  Input (stdin)

  9
  
  2 8 4 1 3 6 8 11 38
  
  

  Expected Output

  2 4 3 8 38

• Program

• #include <stdio.h>
  #include <stdlib.h>
  
  int main()
  {
      int i,n;
      
      scanf("%d",&n);
      int a[n];
      for(i=0;i<n;i++)
      {
          
          scanf("%d",&a[i]);
      }
      printf("\n");
      for(i=0;i<n;i++)
          //printf("%d \t",a[i]);
  
      printf("\n\t");
      for(i=0;i<n;i=i+2)
         printf("%d \t",a[i]);
  
      return 0;
  }