{}
import java.util.Scanner;
class HelloWorld {
public static void main(String[] args) {
Scanner sc =new Scanner(System.in);
System.out.print("enter the size of array=");
int n=sc.nextInt();
System.out.print("enter the marks of students=");
int arr[]= new int[n];
for(int i=0; i<=n-1; i++){
arr[i]=sc.nextInt();
}
for(int i=0; i<=n-1; i++){
if(arr[i]<35)
System.out.println("roll no. is="+i+" ");
}
}
}