CF 505B Mr. Kitayuta's Colorful Graph(最短路)

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题意 求两点之间有多少不同颜色的路径

范围比较小 可以直接floyd

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#include<cstdio>
#include<cstring>
using namespace std;
const int N = 105;
int d[N][N][N], ans;

int main()
{
    int a, b, c, n, m, q;
    while(~scanf("%d%d", &n, &m))
    {
        memset(d, 0, sizeof(d));
        for(int i=1;i<=m;++i)
        {
            scanf("%d%d%d", &a, &b, &c);
            d[c][a][b] = d[c][b][a] = 1;
        }

        for(c = 1; c <= m; ++c)
        for(int k = 1; k <= n; ++k)
        for(int i = 1; i <= n; ++i)
        for(int j = 1; j <= n; ++j)
            if(!d[c][i][j]) d[c][i][j] = d[c][j][i] = (d[c][i][k] && d[c][k][j]);

        scanf("%d", &q);
        while(q--)
        {
            ans = 0;
            scanf("%d%d", &a, &b);
            for(int c = 1; c <= m; ++c)
                if(d[c][a][b]) ++ans;
            printf("%d\n", ans);
        }
    }
    return 0;
}

B. Mr. Kitayuta’s Colorful Graph
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 c**i, connecting vertex a**i and b**i.

Mr. Kitayuta wants you to process the following q queries.

In the i-th query, he gives you two integers — u**i and v**i.

Find the number of the colors that satisfy the following condition: the edges of that color connect vertex u**i and vertex v**i 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 — a**i, b**i (1 ≤ a**i < b**i ≤ n) and c**i (1 ≤ c**i ≤ 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, (a**i, b**i, c**i) ≠ (a**j, b**j, c**j).

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 — u**i and v**i (1 ≤ u**i, v**i ≤ n). It is guaranteed that u**i ≠ v**i.
Output

For each query, print the answer in a separate line.

Sample test(s)

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