package java3;
public class met {
      public static int output1;
      public static void fn(int[] a) {
            int sum = 0;
            for (int i = 0; i <
a.length; i++) {
                  sum
= (int) (sum + Math.pow(a[i], i));
            }
            output1 = sum;
      }
      public static void main(String[]
args) {
            int[] ip1 = { 3, 6,
2, 1 };
            fn(ip1);
            System.out.println(output1);
      }
}