Write a program that,
given a directed multigraph with arcs with positive costs,
computes the cost of the second cheapest walk
from vertex 0 to every other vertex.
Remember that a multigraph may have arcs from *x* to *x*,
and more than one arc from *x* to *y*.
Also remember that a walk can repeat vertices and arcs.

**Input**

Input consists of several cases.
Every case begins with the number of vertices *n* and the number of arcs *m*,
followed by *m* triples *x* *y* *c*
to indicate an arc from *x* to *y* with cost *c*.
Assume 2 ≤ *n* ≤ 10^{4},
0 ≤ *m* ≤ 5*n*,
that vertices are numbered from 0 to *n* − 1,
and that every cost *c* is an integer number between 1 and 10^{4}.

**Output**

For every case,
print the second minimum cost of walking from 0 to the rest of vertices,
ordered from 1 to *n* − 1.
If there is no second best walk to some vertex, just print “`no`”.
Print a line with ten dashes at the end of every case.

Public test cases

**Input**

4 3 0 1 100 0 3 200 1 3 50 5 8 0 4 42 0 4 12 1 0 10000 0 1 7 0 3 100 3 3 5000 3 2 23 0 2 6000

**Output**

no no 200 ---------- 10014 5123 5100 42 ----------

Information

- Author
- Salvador Roura
- Language
- English
- Official solutions
- C++
- User solutions
- C++
- Event
- Dotzè Concurs de Programació de la UPC - Final
- Date
- 2014-10-01