Python and PRIM'S Algorithm.

For this warm-up task you are to implement any ecient minimum spanning tree algorithm that takes a sequence of edge-weighted graphs and outputs the minimum cost weight of a spanning tree of each.For this assignment we use adjacency matrices with positive integer weights. Here a zero entry at row i and column j indicates that no edge ij exists in the graph. The rst line consists of an integer n 1000 denoting the order of the graph. This is then followed by n lines of n white-space separated integers denoting edge weights. The sequence of graphs is terminated by a value n = 0, which is not processed.