Enter a map filename: map0.txt

Now trying to open map0.txt
Number of cities: 3

table is
Slice 0:
  0   0   0   0 
  0   0   1 INF 
  0 INF   0   1 
  0   1 INF   0 

Slice 1:
  0   0   0   0 
  0   0   1 INF 
  0 INF   0   1 
  0   1   2   0 

Slice 2:
  0   0   0   0 
  0   0   1   2 
  0 INF   0   1 
  0   1   2   0 

Slice 3:
  0   0   0   0 
  0   0   1   2 
  0   2   0   1 
  0   1   2   0 


Enter 0 to quit.
From what city (from 1 to 3)? 1
  To what city (1-3)? 3
From city # 1
  to city # 3
  the minimum cost of a path is 2

And the path is 
1 > 2 > 3


Enter 0 to quit.
From what city (from 1 to 3)? 3
  To what city (1-3)? 1
From city # 3
  to city # 1
  the minimum cost of a path is 1

And the path is 
3 > 1


Enter 0 to quit.
From what city (from 1 to 3)? 3
  To what city (1-3)? 2
From city # 3
  to city # 2
  the minimum cost of a path is 2

And the path is 
3 > 1 > 2


Enter 0 to quit.
From what city (from 1 to 3)? 0