The Shortest Statement

Description:

Input:

The first line contains two integers $$$n$$$ and $$$m~(1 \le n, m \le 10^5, m - n \le 20)$$$ — the number of vertices and edges in the graph.

Next $$$m$$$ lines contain the edges: the $$$i$$$-th edge is a triple of integers $$$v_i, u_i, d_i~(1 \le u_i, v_i \le n, 1 \le d_i \le 10^9, u_i \neq v_i)$$$. This triple means that there is an edge between vertices $$$u_i$$$ and $$$v_i$$$ of weight $$$d_i$$$. It is guaranteed that graph contains no self-loops and multiple edges.

The next line contains a single integer $$$q~(1 \le q \le 10^5)$$$ — the number of queries.

Each of the next $$$q$$$ lines contains two integers $$$u_i$$$ and $$$v_i~(1 \le u_i, v_i \le n)$$$ — descriptions of the queries.

Pay attention to the restriction $$$m - n ~ \le ~ 20$$$.

Output:

Print $$$q$$$ lines.

The $$$i$$$-th line should contain the answer to the $$$i$$$-th query — the shortest distance between vertices $$$u_i$$$ and $$$v_i$$$.

Sample Input:

3 3
1 2 3
2 3 1
3 1 5
3
1 2
1 3
2 3

Sample Output:

3
4
1

Sample Input:

8 13
1 2 4
2 3 6
3 4 1
4 5 12
5 6 3
6 7 8
7 8 7
1 4 1
1 8 3
2 6 9
2 7 1
4 6 3
6 8 2
8
1 5
1 7
2 3
2 8
3 7
3 4
6 8
7 8

Sample Output:

7
5
6
7
7
1
2
7