[cpp]
//臥槽這種水題WA的淚流滿面
//floyd的中轉點要放在最上層循環比較好
#include <iostream>
#include <cstdio>
#include <cstring>
using namespace std;
#define MAXN 110
int n,m;
double dist[MAXN][MAXN];
int a,b,p;
void Floyd()
{
for(int k = 1; k <= n; k++)
for(int i = 1; i <= n; i++)
{
for(int j = 1; j <= n; j++)
{
if(dist[i][j] < dist[i][k]*dist[k][j])
dist[i][j] = dist[i][k]*dist[k][j];
}
}
}
int main()
{
while(scanf("%d",&n)!=EOF &&n)
{
if(n == 0)
break;
cin>>m;
for(int i = 1; i <= n; i++)
{
for(int j = 1; j <= n; j++)
{
if(i == j)
dist[i][j] = 1;
else
dist[i][j] = 0;
}
}
// while(m--)
for(int i = 0; i < m; i++)
{
cin>>a>>b>>p;
dist[a][b] = dist[b][a] =(double)p/100;
}
Floyd();
printf("%.6lf percent\n",dist[1][n]*100);
}
return 0;
}
//臥槽這種水題WA的淚流滿面
//floyd的中轉點要放在最上層循環比較好
#include <iostream>
#include <cstdio>
#include <cstring>
using namespace std;
#define MAXN 110
int n,m;
double dist[MAXN][MAXN];
int a,b,p;
void Floyd()
{
for(int k = 1; k <= n; k++)
for(int i = 1; i <= n; i++)
{
for(int j = 1; j <= n; j++)
{
if(dist[i][j] < dist[i][k]*dist[k][j])
dist[i][j] = dist[i][k]*dist[k][j];
}
}
}
int main()
{
while(scanf("%d",&n)!=EOF &&n)
{
if(n == 0)
break;
cin>>m;
for(int i = 1; i <= n; i++)
{
for(int j = 1; j <= n; j++)
{
if(i == j)
dist[i][j] = 1;
else
dist[i][j] = 0;
}
}
// while(m--)
for(int i = 0; i < m; i++)
{
cin>>a>>b>>p;
dist[a][b] = dist[b][a] =(double)p/100;
}
Floyd();
printf("%.6lf percent\n",dist[1][n]*100);
}
return 0;
}
