I always wondered if there was a program to draw the graph given the input of the graph just like the input given in graph problems. My friend introduced me to Graphviz and showed me how it draws the graph given the input after some tweaking and scripting. Does anyone know how to do the same on Ubuntu 32 bit system? I am facing problems reproducing the script,etc as he uses Windows.

UPD: I have now solved the problem. It was something with the files. Thank you for your kind support.