/*
このコード、と～おれ!
Be accepted!
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*/

#include <cstdio>
#include <algorithm>
#include <string>
#include <cmath>
#include <cstring>
#include <vector>
#include <numeric>
#include <iostream>
#include <random>
#include <map>
#include <unordered_map>
#include <queue>
#include <regex>
#include <functional>
#include <complex>
#include <list>
#include <cassert>
#include <iomanip>
#include <set>
#include <stack>
#include <bitset>
#include <array>

////多倍長整数, cpp_intで宣言
//#include <boost/multiprecision/cpp_int.hpp>
//using namespace boost::multiprecision;
//
//#pragma GCC target ("avx2")
//#pragma GCC target("arch=skylake-avx512")
//#pragma GCC optimiz ("O3")
//#pragma GCC target ("sse4")
//#pragma GCC optimization ("unroll-loops")
//#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")
#define repeat(i, n, m) for(int i = n; i < (m); ++i)
#define rep(i, n) for(int i = 0; i < (n); ++i)
#define printynl(a) printf(a ? "yes\n" : "no\n")
#define printyn(a) printf(a ? "Yes\n" : "No\n")
#define printYN(a) printf(a ? "YES\n" : "NO\n")
#define printim(a) printf(a ? "possible\n" : "imposible\n")
#define printdb(a) printf("%.50lf\n", a) //少数出力
#define printLdb(a) printf("%.50Lf\n", a) //少数出力
#define printdbd(a) printf("%.16lf\n", a) //少数出力(桁少なめ)
#define prints(s) printf("%s\n", s.c_str()) //string出力
#define all(x) (x).begin(), (x).end()
#define deg_to_rad(deg) (((deg)/360.0L)*2.0L*PI)
#define rad_to_deg(rad) (((rad)/2.0L/PI)*360.0L)
#define Please return
#define AC 0
#define manhattan_dist(a, b, c, d) (abs(a - c) + abs(b - d)) /*(a, b) から (c, d) のマンハッタン距離 */
#define inf numeric_limits<double>::infinity();
#define linf numeric_limits<long double>::infinity()

using ll = long long;
using ull = unsigned long long;

constexpr int INF = 1073741823;
constexpr int MINF = -1073741823;
constexpr ll LINF = ll(4661686018427387903);
constexpr ll MOD = 1e9 + 7;
constexpr ll mod = 998244353;
constexpr long double eps = 1e-6;
const long double PI = acosl(-1.0L);

using namespace std;

void scans(string& str) {
	char c;
	str = "";
	scanf("%c", &c);
	if (c == '\n')scanf("%c", &c);
	while (c != '\n' && c != -1 && c != ' ') {
		str += c;
		scanf("%c", &c);
	}
}

void scanc(char& str) {
	char c;
	scanf("%c", &c);
	if (c == -1)return;
	while (c == '\n') {
		scanf("%c", &c);
	}
	str = c;
}

double acot(double x) {
	return PI / 2 - atan(x);
}

ll LSB(ll n) { return (n & (-n)); }

template<typename T>
inline T chmin(T& a, const T& b) {
	if (a > b)a = b;
	return a;
}

template<typename T>
inline T chmax(T& a, const T& b) {
	if (a < b)a = b;
	return a;
}

//atcoder library
//#include <atcoder/all>
//using namespace atcoder;

/*-----------------------------------------ここからコード-----------------------------------------*/

using i32 = std::int32_t;
using i64 = std::int64_t;
using u32 = std::uint32_t;
using u64 = std::uint64_t;
using isize = std::ptrdiff_t;
using usize = std::size_t;

#include <cassert>
#include <cstddef>
#include <numeric>
#include <utility>
#include <vector>

class union_enumerate {
	std::vector<usize> next;

public:
	union_enumerate() = default;
	union_enumerate(const usize size) : next(size) {
		std::iota(next.begin(), next.end(), static_cast<usize>(0));
	}

	usize size() const { return next.size(); }

	std::vector<usize> enumerate(const usize x) const {
		assert(x < size());

		std::vector<usize> ret;
		usize y = x;
		do {
			ret.push_back(y);
			y = next[y];
		} while (y != x);
		return ret;
	}

	std::vector<std::vector<usize>> get_all() const {
		const usize n = size();
		std::vector<std::vector<usize>> res;
		std::vector<bool> visited(n, false);
		for (usize i = 0; i != n; i += 1) {
			if (!visited[i]) {
				const std::vector<usize> list = enumerate(i);
				for (const usize j : list)
					visited[j] = true;
				res.push_back(list);
			}
		}
		return res;
	}

	void unite(const usize x, const usize y) {
		assert(x < size());
		assert(y < size());

		std::swap(next[x], next[y]);
	}
};

/*
* @title unionfind
* @docs kyopro/docs/unionfind.md
*/

//0-indexed
struct unionfind {
	vector<int> par, siz;

	unionfind(int n) : par(n), siz(n) {
		for (int i = 0; i < n; ++i) {
			//全部根で初期化
			par[i] = i;
			//サイズは1
			siz[i] = 1;
		}
	}

	void init(int n) {
		par.resize(n);
		siz.resize(n);
		for (int i = 0; i < n; ++i) {
			//全部根で初期化
			par[i] = i;
			//サイズは1
			siz[i] = 1;
		}
	}

	//根を返す
	int find(int a) {
		return par[a] == a ? a : par[a] = find(par[a]);
	}

	//くっつける。元から同じだったらfalseを返す
	bool unite(int a, int b) {
		int x = find(a), y = find(b);
		if (x == y)return false;
		else if (siz[x] < siz[y]) {
			par[x] = y;
			siz[y] += siz[x];
		}
		else if (siz[x] > siz[y]) {
			par[y] = x;
			siz[x] += siz[y];
		}
		else {
			par[x] = y;
			siz[y] += siz[x];
		}
		return true;
	}

	//同じ集合か判定する
	bool same(int a, int b) {
		return find(a) == find(b);
	}

	//サイズを返す
	int size(int a) {
		return siz[find(a)];
	}

	//同じ集合に属す葉を纏めて返す
	vector<int> leaf(int a) {
		vector<int> x;
		int n = par.size();
		for (int i = 0; i < n; ++i)if (same(a, i))x.push_back(i);
		return x;
	}

};


int main() {

	int n, d, w;
	scanf("%d%d%d", &n, &d, &w);
	union_enumerate car(n), walk(n);
	unionfind cntc(n), cntw(n);
	ll ans = 0;
	rep(i, d) {
		int a, b;
		scanf("%d%d", &a, &b);
		if(not cntc.same(a - 1, b - 1)) car.unite(a - 1, b - 1);
		cntc.unite(a - 1, b - 1);
	}
	rep(i, w) {
		int a, b;
		scanf("%d%d", &a, &b);
		if (not cntw.same(a - 1, b - 1)) walk.unite(a - 1, b - 1);
		cntw.unite(a - 1, b - 1);
	}
	vector<bool> flag(n);
	rep(i, n) {
		if (not flag[i]) {
			auto ushi = car.enumerate(i);
			ll m = 0, x = cntc.size(i);
			set<int> b;
			for (const auto& aa : ushi)b.insert(cntw.find(aa)), flag[aa] = true;
			for (const auto& aa : b)m += cntw.size(aa);
			ans += m * x;
			flag[i] = true;
		}
	}
	printf("%lld\n", ans - (ll)n);

	Please AC;
}