All the coins have to meet on the same vertex, not just two of them. u1 and u2 can stay together since they start on the same vertex but they need to meet up with u3.

you may be return the answer as string
be sure tha you return it as integer

i cant understand what should i do if there are 2 coins in the same spot

like---->>
g = {0: {1, 2}, 1: {0, 4}, 2: {0}, 3: {3}, 4: {1, 4}, 5: set()}
u1 = 2
u2 = 2
u3 = 0
should 3
why not None
how....!!

any one can help me ??
i cant understand this KATA
how much vasy can give tickets