Urgent!!!

Please write clear code in C++

A.) You are given two singly-linked 1ists, possibly of different lengthe, that contain distinct elenente without ropeate, Krite the code or. prudo-cede for a funetion CountMatehen () that returna the number of elenents that asteh between the two singly-1inked liste. For example, consider the lista: Listim234Liste2461 There are 3 matchen between the two 11 ste. (1,2, and 4) The Nodes in these singly-1inked liat wili contain a single integer value naned value and a kode pointer named next. Note: If there are no matches or either of the Iiste is empty the result should be 0 . B.) What is the time eogplexity for your function