5363: Mr. Kitayuta's Colorful Graph
内存限制：256 MB
时间限制：2 S
题面：传统
评测方式：文本比较
上传者：
提交：2
通过：1
题目描述
B. Mr. Kitayuta's Colorful Graph
time limit per test
1 second
memory limit per test
256 megabytes
input
standard input
output
standard output
Mr. Kitayuta has just bought an undirected graph consisting of n vertices and m edges. The vertices of the graph are numbered from 1 to n. Each edge, namely edge i, has a color ci, connecting vertex ai and bi.
Mr. Kitayuta wants you to process the following q queries.
In the i-th query, he gives you two integers − ui and vi.
Find the number of the colors that satisfy the following condition: the edges of that color connect vertex ui and vertex vi directly or indirectly.
Mr. Kitayuta wants you to process the following q queries.
In the i-th query, he gives you two integers − ui and vi.
Find the number of the colors that satisfy the following condition: the edges of that color connect vertex ui and vertex vi directly or indirectly.
Input
The first line of the input contains space-separated two integers − n and m (2≤n≤100,1≤m≤100), denoting the number of the vertices and the number of the edges, respectively. The next m lines contain space-separated three integers − ai, bi (1≤ai<bi≤n) and ci (1≤ci≤m). Note that there can be multiple edges between two vertices. However, there are no multiple edges of the same color between two vertices, that is, if i≠j, (ai,bi,ci)≠(aj,bj,cj).
The next line contains a integer − q (1≤q≤100), denoting the number of the queries.
Then follows q lines, containing space-separated two integers − ui and vi (1≤ui,vi≤n). It is guaranteed that ui≠vi.
Output
For each query, print the answer in a separate line.
Examples
Input
4 5 1 2 1 1 2 2 2 3 1 2 3 3 2 4 3 3 1 2 3 4 1 4
Output
2 1 0
Input
5 7 1 5 1 2 5 1 3 5 1 4 5 1 1 2 2 2 3 2 3 4 2 5 1 5 5 1 2 5 1 5 1 4
Output
1 1 1 1 2
Note
Let's consider the first sample. 
The figure above shows the first sample.
- Vertex 1 and vertex 2 are connected by color 1 and 2.
- Vertex 3 and vertex 4 are connected by color 3.
- Vertex 1 and vertex 4 are not connected by any single color.
输入样例 复制
输出样例 复制