class MyClass {

  public static void find_max_sum(Integer[] v) {
        int[] value = new int[v.length];
        value[0] = v[0];
        value[1] = Math.max(v[0],v[1]);
      for(int i = 2; i < v.length ; i ++ ) {
          value[i] = Math.max(v[i] + value[i-2], value[i-1]);
      }
        System.out.println(value[value.length-1]);
    }
}