#define _USE_MATH_DEFINES
#include <bits/stdc++.h>
using namespace std;
#define FOR(i,m,n) for(int i=(m);i<(n);++i)
#define REP(i,n) FOR(i,0,n)
#define ALL(v) (v).begin(),(v).end()
using ll = long long;
constexpr int INF = 0x3f3f3f3f;
constexpr long long LINF = 0x3f3f3f3f3f3f3f3fLL;
constexpr double EPS = 1e-8;
constexpr int MOD = 1000000007;
// constexpr int MOD = 998244353;
constexpr int dy[] = {1, 0, -1, 0}, dx[] = {0, -1, 0, 1};
constexpr int dy8[] = {1, 1, 0, -1, -1, -1, 0, 1}, dx8[] = {0, -1, -1, -1, 0, 1, 1, 1};
template <typename T, typename U> inline bool chmax(T &a, U b) { return a < b ? (a = b, true) : false; }
template <typename T, typename U> inline bool chmin(T &a, U b) { return a > b ? (a = b, true) : false; }
struct IOSetup {
  IOSetup() {
    std::cin.tie(nullptr);
    std::ios_base::sync_with_stdio(false);
    std::cout << fixed << setprecision(20);
  }
} iosetup;

struct UnionFind {
  UnionFind(int n) : data(n, -1) {}

  int root(int ver) { return data[ver] < 0 ? ver : data[ver] = root(data[ver]); }

  bool unite(int u, int v) {
    u = root(u);
    v = root(v);
    if (u == v) return false;
    if (data[u] > data[v]) std::swap(u, v);
    data[u] += data[v];
    data[v] = u;
    return true;
  }

  bool same(int u, int v) { return root(u) == root(v); }

  int size(int ver) { return -data[root(ver)]; }

private:
  std::vector<int> data;
};

int main() {
  int n, d, w; cin >> n >> d >> w;
  UnionFind drive(n), walk(n);
  while (d--) {
    int a, b; cin >> a >> b; --a; --b;
    drive.unite(a, b);
  }
  while (w--) {
    int c, d; cin >> c >> d; --c; --d;
    walk.unite(c, d);
  }
  vector<vector<int>> drive_comp(n);
  REP(i, n) drive_comp[drive.root(i)].emplace_back(i);
  ll ans = 0;
  for (const vector<int> &comp : drive_comp) {
    if (comp.empty()) continue;
    vector<int> roots;
    for (int e : comp) roots.emplace_back(walk.root(e));
    sort(ALL(roots));
    roots.erase(unique(ALL(roots)), roots.end());
    int sum = 0, size = comp.size();
    for (int e : roots) sum += walk.size(e);
    sum -= size;
    ans += 1LL * size * (size - 1) + 1LL * size * sum;
  }
  cout << ans << '\n';
  return 0;
}