UVA 10048 Audiophobia

floyd算法的变形，输出格式问题要注意。。。

代码如下：

#include<stdio.h>
#define MAXNC 100 + 10
#define INF 100000 + 100

int d[MAXNC][MAXNC];
int C, S, Q, num;

void init()
{
    num = 0;
    while(scanf("%d%d%d",&C, &S, &Q))
    {
        if(C <= 1) break;
        else if(num != 0)
        printf("\n");
        for(int i = 0; i <= C; i ++)
            for(int j = 0; j <= C; j ++)
            {
                if(i != j) d[i][j] = INF;
                else d[i][j] = 0;
            }
        for(int i = 0; i < S; i ++)
        {
            int x, y, w;
            scanf("%d%d%d", &x, &y, &w);
            if(d[x][y] > w)
                d[x][y] = w, d[y][x] = w;
        }    
        for(int k = 1; k <= C; k ++)
        for(int i = 1; i <= C; i ++)
            for(int j = 1; j <= C; j ++)
            {
                if(d[i][k] != INF && d[k][j] != INF)
                {
                    if(d[i][k] >= d[k][j])
                    {
                        if(d[i][k] < d[i][j])
                        d[i][j] = d[i][k];
                    }
                    else if(d[k][j] < d[i][j]) d[i][j] = d[k][j];
                }
            }
        printf("Case #%d\n",++num);
        for(int i = 0; i < Q; i ++)
        {
            int a, b;
            scanf("%d%d",&a,&b);
            if(d[b][a] < INF) printf("%d\n",d[a][b]);
            else printf("no path\n");
        }    
    }
}
int main()
{
    init();
    return 0;
}