#include <iostream>
#include <cstdio>
using namespace std;
const int maxn = 1234;
const int _max = 0x3f3f3f3f;
int dist[maxn][maxn];
int dir[maxn][maxn];
int a[maxn];
int n, k;
void flody()
{
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] + a[k])
{
dist[i][j] = dist[i][k] + dist[k][j] + a[k];
dir[i][j] = dir[i][k];
}
else if(dist[i][j] == dist[i][k]+dist[k][j]+a[k] && dir[i][j]>dir[i][k])
dir[i][j] = dir[i][k];
}
void output()
{
int u, v;
while(scanf("%d %d", &u, &v))
{
if(u==-1&&v==-1) break;
int m = u;
printf("From %d to %d :\n", u, v);
printf("Path: %d", u);
while(u!=v)
{
printf("-->%d", dir[u][v]);
u = dir[u][v];
}
printf("\n");
printf("Total cost : %d\n\n", dist[m][v]);
}
}
int main()
{
while(scanf("%d", &n) != EOF && n)
{
for(int i = 1; i <= n; i++)
for(int j = 1; j <= n; j++)
{
scanf("%d", &dist[i][j]);
if(dist[i][j] == -1) dist[i][j] = _max;
dir[i][j] = j;
}
for(int i = 1; i <= n; i++)
scanf("%d", &a[i]);
flody();
output();
}
}