poj 2472 106 miles to Chicago floyd

#include <stdio.h>
#include <string.h>

int n,m;
double map[105][105];

void floyd()
{
int i,j,k;
for (i=1;i<=n;i++)
{
for (j=1;j<=n;j++)
{
for (k=1;k<=n;k++)
{
if(i==j||i==k||j==k)continue;
if(map[j][k]<map[j][i]*map[i][k])
map[j][k]=map[j][i]*map[i][k];
}
}
}
}

int main()
{
int a,b,i;
double p;
while (scanf("%d",&n)&&n)
{
scanf("%d",&m);
memset(map,0,sizeof(map));
for (i=0;i<m;i++)
{
scanf("%d%d%lf",&a,&b,&p);
map[a][b]=map[b][a]=p/100;
}
floyd();
printf("%.6lf percent\n",map[1]
*100);
}
return 0;
}