I was solving the problem Uva 10600 in which we have to find the minimum and second minimum spanning tree I found the minimum spanning tree using kruskal's algorithm and stored the edges in a vector mst then to find the second minimum spanning tree I did this

second_tot_wt=INF for edge in mst : second_tot_wt=min(second_tot_wt,total weight of the minimum spanning tree ignoring this edge)

my code was fine on the test case but I am getting the verdict wrong answer can someone please help

my solution