//@formatter:off
#include<bits/stdc++.h>
#define rep(i,n) for (int i = 0; i < int(n); ++i)
#define rrep(i,n) for (int i = int(n)-1; i >= 0; i--)
#define rep2(i,s,n) for (int i = int(s); i < int(n); ++i)
#define all(a) a.begin(),a.end()
#define rall(a) a.rbegin(),a.rend()
#define pb push_back
#define eb emplace_back
#define vi vector<int>
#define vvi vector<vector<int>>
#define vl vector<ll>
#define vvl vector<vector<ll>>
#define vd vector<double>
#define vvd vector<vector<double>>
#define vs vector<string>
#define vc vector<char>
#define vvc vector<vector<char>>
#define vb vector<bool>
#define vvb vector<vector<bool>>
#define vp vector<P>
#define vvp vector<vector<P>>
using namespace std;
using ll = long long;
using P = pair<int,int>;
using LP = pair<ll,ll>;
template<class S,class T> istream& operator>>(istream &is,pair<S,T> &p) { return is >> p.first >> p.second; }
template<class S,class T> ostream& operator<<(ostream &os,const pair<S,T> &p) { return os<<'{'<<p.first<<","<<p.second<<'}'; }
template<class T> istream& operator>>(istream &is,vector<T> &v) { for(T &t:v){is>>t;} return is; }
template<class T> ostream& operator<<(ostream &os,const vector<T> &v) { os<<'[';rep(i,v.size())os<<v[i]<<(i==int(v.size()-1)?"":","); return os<<']'; }
void Yes(bool b) { cout << (b ? "Yes" : "No") << '\n'; }
void YES(bool b) { cout << (b ? "YES" : "NO") << '\n'; }
template<class T> bool chmin(T& a,T b) {if(a > b){a = b; return true;} return false;}
template<class T> bool chmax(T& a,T b) {if(a < b){a = b; return true;} return false;}
const int inf = 1001001001;
const ll linf = 1001001001001001001;
//@formatter:on

class unionfind {
    int n;
    vector<int> par, rank;
public:
    unionfind(int n) : n(n), par(n, -1), rank(n, 0) {}
    
    int root(int x) {
        if (par[x] < 0) return x;
        else return par[x] = root(par[x]);
    }
    
    bool same(int x, int y) { return root(x) == root(y); };
    
    bool merge(int x, int y) {
        x = root(x);
        y = root(y);
        if (x == y) return false;
        if (rank[x] < rank[y]) swap(x, y);
        if (rank[x] == rank[y]) rank[x]++;
        par[x] += par[y];
        par[y] = x;
        return true;
    }
    
    int size(int x) { return -par[root(x)]; };
    
    bool connected() {
        rep(i, n - 1) if (!same(i, i + 1)) return false;
        return true;
    }
};

int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    cout.tie(nullptr);
    int n, D, w;
    cin >> n >> D >> w;
    vvi G(n);
    rep(_, D) {
        int a, b;
        cin >> a >> b;
        a--;
        b--;
        G[a].pb(b);
        G[b].pb(a);
    }
    unionfind uf(n);
    rep(_, w) {
        int c, d;
        cin >> c >> d;
        c--;
        d--;
        uf.merge(c, d);
    }
    vb seen(n);
    vi ls;
    auto dfs = [&](auto &self, int u) -> void {
        ls.pb(u);
        seen[u] = true;
        for (int v : G[u]) {
            if (seen[v]) continue;
            self(self, v);
        }
    };
    ll ans = 0;
    rep(i, n) {
        if (seen[i]) continue;
        dfs(dfs, i);
        set<int> rt;
        for (int j : ls) {
            rt.insert(uf.root(j));
        }
        ll cnt = 0;
        for (int j : rt) {
            cnt += uf.size(j);
        }
        ans += (cnt - 1) * ls.size();
        ls.clear();
    }
    cout << ans << endl;
}