Case B doesn’t work and C won’t work as well , can someone help me to make it work (the program should calculate the execution time for the dijkstra and BellmanFord functions) thank u 
Please do write your code in between pair of three back ticks, like this
Hello, World!
And explain the problem you’re facing.
hello ,sorry, I have provided a picture , because it shows more and I have written my problem at the beginning because the code is quite long to be structured in the boxes only