Problem: After a successful field test, Heidi is considering deploying a trap along some Corridor, possibly not the first one. She wants to avoid meeting the Daleks inside the Time Vortex, so for abundance of caution she considers placing the traps only along those Corridors that are not going to be used according to the current Daleks' plan – which is to use a minimum spanning tree of Corridors. Heidi knows that all energy requirements for different Corridors are now different, and that the Daleks have a single unique plan which they are intending to use.

Your task is to calculate the number E_{max}(c), which is defined in the same way as in the easy version – i.e., the largest e ≤ 10^9 such that if we changed the energy of corridor c to e, the Daleks might use it – but now for every corridor that Heidi considers. 

Input

The first line: number n of destinations, number m of Time Corridors (2 ≤ n ≤ 10^5, n - 1 ≤ m ≤ 10^6). The next m lines: destinations a, b and energy e (1 ≤ a, b ≤ n, a ≠ b, 0 ≤ e ≤ 10^9).

No pair \\{a, b\} will repeat. The graph is guaranteed to be connected. All energy requirements e are distinct.

Output

Output m-(n-1) lines, each containing one integer: E_{max}(c_i) for the i-th Corridor c_i from the input that is not part of the current Daleks' plan (minimum spanning tree).

Example

Input

3 3
1 2 8
2 3 3
3 1 4


Output

4

Note

If m = n-1, then you need not output anything.

Solution (in CPP):

Solution:
#include <bits/stdc++.h>
using namespace std;
const signed int inf = (signed)(~0u >> 1);
const signed int llf = (signed int)(~0ull >> 1);
template <typename T>
inline void readInteger(T& u) {
  static char x;
  while (!isdigit(x = getchar()))
    ;
  for (u = x - '0'; isdigit(x = getchar()); u = u * 10 + x - '0')
    ;
}
template <typename T>
class Matrix {
 public:
  T* p;
  int row;
  int col;
  Matrix() : p(NULL) {}
  Matrix(int row, int col) : row(row), col(col) { p = new T[(row * col)]; }
  T* operator[](int pos) { return p + (pos * col); }
};
typedef class Edge {
 public:
  int u;
  int v;
  int w;
  bool seced;
  int rid;
  Edge(int u = 0, int v = 0, int w = 0) : u(u), v(v), w(w), seced(false) {}
  bool operator<(Edge b) const { return w < b.w; }
} Edge;
typedef class Node {
 public:
  int val;
  Node* nxt[2];
  Node(int val = inf) : val(val) { nxt[0] = nxt[1] = NULL; }
} Node;
typedef pair<Node*, Node*> pnn;
Node pool[2000000];
Node* top = pool;
Node* newnode(int x) {
  if (top == pool + 2000000) return new Node(x);
  *top = Node(x);
  return top++;
}
Node* merge(Node*& l, Node* r) {
  if (l == NULL) return r;
  if (r == NULL) return l;
  if (l->val > r->val) swap(l, r);
  int p = rand() % 2;
  l->nxt[p] = merge(l->nxt[p], r);
  return l;
}
int n, m;
Edge* edge;
int* res;
int* ans;
inline void init() {
  readInteger(n);
  readInteger(m);
  edge = new Edge[(m + 1)];
  for (int i = 1; i <= m; i++) {
    readInteger(edge[i].u);
    readInteger(edge[i].v);
    readInteger(edge[i].w);
    edge[i].rid = i;
  }
}
int* f;
int find(int x) { return (f[x] != x) ? (f[x] = find(f[x])) : (x); }
vector<int>* g;
vector<int>* add;
vector<int>* del;
inline void Kruskal() {
  f = new int[(n + 1)];
  g = new vector<int>[(n + 1)];
  for (int i = 1; i <= n; i++) f[i] = i;
  sort(edge + 1, edge + m + 1);
  int fin = 0;
  for (int i = 1; i <= m && fin < n - 1; i++) {
    if (find(edge[i].u) != find(edge[i].v)) {
      f[find(edge[i].u)] = find(edge[i].v);
      g[edge[i].u].push_back(i);
      g[edge[i].v].push_back(i);
      edge[i].seced = true;
      fin++;
    }
  }
}
const int BZMAX = 18;
int* dep;
Matrix<int> bz;
Matrix<int> bzm;
void dfs1(int node, int fa, int lastv) {
  dep[node] = dep[fa] + 1;
  bz[node][0] = fa;
  bzm[node][0] = lastv;
  for (int i = 1; i < BZMAX; i++)
    bz[node][i] = bz[bz[node][i - 1]][i - 1],
    bzm[node][i] = max(bzm[node][i - 1], bzm[bz[node][i - 1]][i - 1]);
  for (int i = 0; i < (signed)g[node].size(); i++) {
    if (!edge[g[node][i]].seced) continue;
    int e = (edge[g[node][i]].u == node) ? (edge[g[node][i]].v)
                                         : (edge[g[node][i]].u);
    if (e == fa) continue;
    dfs1(e, node, edge[g[node][i]].w);
  }
}
pair<int, int> lca(int u, int v) {
  if (dep[u] < dep[v]) swap(u, v);
  int rtmax = 0;
  int ca = dep[u] - dep[v];
  for (int i = 0; i < BZMAX; i++)
    if (ca & (1 << i)) {
      rtmax = max(rtmax, bzm[u][i]);
      u = bz[u][i];
    }
  if (u == v) return pair<int, int>(u, rtmax);
  for (int i = BZMAX - 1; ~i; i--) {
    if (bz[u][i] != bz[v][i]) {
      rtmax = max(rtmax, bzm[u][i]);
      rtmax = max(rtmax, bzm[v][i]);
      u = bz[u][i];
      v = bz[v][i];
    }
  }
  rtmax = max(rtmax, bzm[u][0]);
  rtmax = max(rtmax, bzm[v][0]);
  return pair<int, int>(bz[u][0], rtmax);
}
pair<Node*, Node*> dfs2(int node, int fa, int tofa) {
  Node* rt = NULL;
  Node* dl = NULL;
  for (int i = 0; i < (signed)g[node].size(); i++) {
    if (!edge[g[node][i]].seced) continue;
    int e = (edge[g[node][i]].u == node) ? (edge[g[node][i]].v)
                                         : (edge[g[node][i]].u);
    if (e == fa) continue;
    pnn ap = dfs2(e, node, g[node][i]);
    rt = merge(rt, ap.first);
    dl = merge(dl, ap.second);
  }
  for (int i = 0; i < (signed)add[node].size(); i++)
    rt = merge(rt, newnode(add[node][i]));
  for (int i = 0; i < (signed)del[node].size(); i++)
    dl = merge(dl, newnode(del[node][i]));
  while (dl && rt->val == dl->val) {
    rt = merge(rt->nxt[0], rt->nxt[1]);
    rt = merge(rt->nxt[0], rt->nxt[1]);
    dl = merge(dl->nxt[0], dl->nxt[1]);
  }
  res[tofa] = (!rt) ? (-1) : (rt->val);
  return pnn(rt, dl);
}
inline void solve() {
  res = new int[(m + 1)];
  dep = new int[(n + 1)];
  bz = Matrix<int>(n + 1, BZMAX);
  bzm = Matrix<int>(n + 1, BZMAX);
  dep[0] = 0;
  for (int i = 0; i < BZMAX; i++) bz[0][i] = bzm[0][i] = 0;
  dfs1(1, 0, 0);
  add = new vector<int>[(n + 1)];
  del = new vector<int>[(n + 1)];
  for (int i = 1; i <= m; i++) {
    if (edge[i].seced) {
      res[i] = -2;
      continue;
    }
    int u = edge[i].u, v = edge[i].v;
    pair<int, int> l = lca(u, v);
    res[i] = l.second;
  }
  ans = new int[(m + 1)];
  for (int i = 1; i <= m; i++) ans[edge[i].rid] = res[i];
  for (int i = 1; i <= m; i++) {
    if (ans[i] != -2) {
      printf("%d\n", (ans[i] != -1) ? (ans[i]) : (1000000000));
    }
  }
}
int main() {
  srand(233);
  init();
  Kruskal();
  solve();
  return 0;
}