#include <bits/stdc++.h>
using namespace std;
int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(0);
  cout.tie(0);
  int n, m;
  cin >> n >> m;
  vector<int> arr(n);
  for (auto& x : arr) cin >> x;
  vector<int> p(m);
  for (int i = 0; i < m; i++) p[i] = i;
  vector<vector<int>> mp(m);
  int ans = 0;
  for (int i = 0; i < n; i++) {
    if (i > 0 && arr[i - 1] != arr[i]) ans++;
    mp[arr[i] - 1].push_back(i);
  }
  cout << ans << endl;
  for (int i = 0; i < m - 1; i++) {
    int u, v;
    cin >> u >> v;
    u--, v--;
    while (p[u] != u) {
      u = p[u];
    }
    while (p[v] != v) {
      v = p[v];
    }
    if (mp[v].size() > mp[u].size()) swap(u, v);
    for (int x : mp[v]) {
      if (x + 1 < n && arr[x + 1] == u + 1) ans--;
      if (x > 0 && arr[x - 1] == u + 1) ans--;
    }
    for (int x : mp[v]) {
      arr[x] = u + 1;
      mp[u].push_back(x);
    }
    mp[v].clear();
    p[v] = u;
    cout << ans << endl;
  }
  return 0;
}
