Operations on graph
Create an undirected graph that supports the next operations:
- AddEdge(u, v) - add to the graph an edge between the vertices (u, v);
- Vertex(u) - print the list of vertices, adjacent with the vertex u.
There is no loops and multiple edges in the graph.
The first line contains the number of vertices in a graph n (1 ≤ n ≤
105). The next line contains the number of operations k (0 ≤ k ≤
106). Each next line describes the operation in format: "1 " or "2 ", representing respectively the operation AddEdge(u, v) and Vertex(u).
It is guaranteed that the total amount of numbers to be printed during all operations Vertex, does not exceed 2 *
For each operation Vertex print in a separate line the list of adjacent vertices for a given vertex. The vertices in a list can be printed in any order. If some vertex hasn't adjacent vertices, print the empty line.
4 4 1 1 2 1 2 3 2 4 2 2