Sum of nodes which are greater than upcoming nodes of linked list

Write an algorithm which are fulfill given of following test cases.

If linked list empty or only one node then result is zero. In a situation only single node of linked list then this case there are no upcoming node.

Compare linked list nodes from first node to last node if current node is greater than next node get the current element value and add to resultant.

Final test condition, If more then two nodes of linked list then check that last node value is greater than of first node in linked list. If greater, then in this situation add last node value in resultant.

Suppose we are inserted the following (4,2,9,3,7,10,5) node in a sequence.

Here given code implementation process.

1) Sum of all elements whose value greater than next adjacent node in java 2) Sum of all elements whose value greater than next adjacent node in c++ 3) Sum of all elements whose value greater than next adjacent node in c 4) Sum of all elements whose value greater than next adjacent node in c# 5) Sum of all elements whose value greater than next adjacent node in vb.net 6) Sum of all elements whose value greater than next adjacent node in php 7) Sum of all elements whose value greater than next adjacent node in node js 8) Sum of all elements whose value greater than next adjacent node in python 9) Sum of all elements whose value greater than next adjacent node in ruby 10) Sum of all elements whose value greater than next adjacent node in scala 11) Sum of all elements whose value greater than next adjacent node in swift 12) Sum of all elements whose value greater than next adjacent node in golang 13) Sum of all elements whose value greater than next adjacent node in kotlin 14) Sum of all elements whose value greater than next adjacent node in typescript