fenil
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fenil's post in edges and vertices was marked as the answer
Given N = 4, A = [1, 3], B = [2, 4] function should return 10. The graph contains two edges: (1, 2) and (3, 4). We can assign following values to the vertices: 4, 3, 2, 1.
The sum of values at the edges' endpoints is (4 + 3) + (2 + 1) = 10.
how to find edges of vertices and sum of values at the edges' endpoints ?
function ec($n, array $a, array $b){ }