Format of files:

First line contains value of N
Second line contains value of M
Next M lines contain edges as triplets node-from node-to weight

• g_dir_weigh_positive_5_15.txt
• g_dir_weigh_positive_10_60.txt
• g_dir_weigh_positive_100_600.txt
• g_dir_weigh_positive_1000_10000.txt