int f(int ind , int n , vector&a , vector&b) {

vector<int>adj[n + 1];

int m = a.size();

for (int i = 0 ; i < m ; i++) {

    if (i == ind)continue;

    adj[a[i]].push_back(b[i]);

    adj[b[i]].push_back(a[i]);

}

vector<int>dist(n + 1 , 1e9);

dist[1] = 0;

queue<int> q;

q.push(1);

while (!q.empty()) {

    int u = q.front();

    q.pop();

    for (auto v : adj[u]) {

       if (dist[v] > 1 + dist[u]) {

         dist[v] = 1 + dist[u];

         q.push(v);

       }

    }

}

return dist[n] == 1e9 ? -1 : dist[n];

}

vector townTravel(int n , vector&a , vector& b) {

int m = a.size();

vector<int> ans;

for (int i = 0 ; i < m ; i++) {

    int num = f(i , n , a , b);

    ans.push_back(num);

}

return ans;

}