In reply to amy992:
You need to explain what “doesn’t work” means. When I run this, I get
# m is '{'{1, 1}, '{1, -1}}
# n_sum is 50
In reply to amy992:
You need to explain what “doesn’t work” means. When I run this, I get
# m is '{'{1, 1}, '{1, -1}}
# n_sum is 50