A proper way to create a matrix in c++

Question

I want to create an adjacency matrix for a graph. Since I read it is not safe to use arrays of the form matrix[x][y] because they don\'t check for range, I deci

Answer 1

my favourite way to store a graph is vector>; n elements in vector (nodes 0..n-1), >=0 elements in each set (edges). Just do not forget adding a reverse copy of every bi-directional edge.