== include(page="template/taskheader" task_id="sumtree") ==

You are given a tree with $N$ nodes. Each node has values assigned to it, <tex> value_i </tex>. You must calculate the sum cost of every pair nodes <tex>(u, v)</tex>, where <tex>gcd(value[u], value[v]) > 1</tex> and $u$ &ne; $v$. For a pair of nodes <tex>(u, v)<tex>, we define the cost of that path to be the sum of value of all nodes that lie inside the <tex>(u, v)</tex> path.

You are given a tree with $N$ nodes. Each node has values assigned to it, value[i]. You must calculate the sum cost of every pair nodes $(u, v)$, where $gcd(value[u], value[v]) > 1$ and $u$ ≠ $v$. For a pair of nodes $(u, v)$, we define the cost of that path to be the sum of value of all nodes that lie inside the $(u, v)$ path.

h2. Date de intrare