#include<bits/stdc++.h>
#define rep(i,a,b) for(int i=a;i<b;i++)
#define rrep(i,a,b) for(int i=a;i>=b;i--)
#define fore(i,a) for(auto &i:a)
#define all(x) (x).begin(),(x).end()
#pragma GCC optimize ("-O3")
using namespace std; void _main(); int main() { cin.tie(0); ios::sync_with_stdio(false); _main(); }
typedef long long ll; const int inf = INT_MAX / 2; const ll infl = 1LL << 60;
template<class T>bool chmax(T &a, const T &b) { if (a<b) { a = b; return 1; } return 0; }
template<class T>bool chmin(T &a, const T &b) { if (b<a) { a = b; return 1; } return 0; }
//---------------------------------------------------------------------------------------------------
// vid : id -> vid          head, heavy, parent : unknown
// depth : id -> depth      inv : vid -> id
struct HLDecomposition {
    vector<set<int>> g; vector<int> vid, head, heavy, parent, depth, inv, in, out;
    HLDecomposition() {} HLDecomposition(int n) { init(n); }
    void init(int n) {
        g.resize(n); vid.resize(n, -1); head.resize(n); heavy.resize(n, -1);
        parent.resize(n); depth.resize(n); inv.resize(n); in.resize(n); out.resize(n);
    }
    void add(int u, int v) { g[u].insert(v); g[v].insert(u); } void build() { dfs(0, -1); dfs_hld(); }
    int dfs(int curr, int prev) {
        parent[curr] = prev; int sub = 1, max_sub = 0;
        for (int next : g[curr]) if (next != prev) {
            depth[next] = depth[curr] + 1;
            int sub_next = dfs(next, curr); sub += sub_next;
            if (max_sub < sub_next) max_sub = sub_next, heavy[curr] = next;
        }return sub;
    }

    int t = 0;
    void dfs_hld(int v = 0)
    {
        vid[v] = in[v] = t;
        t++;
        inv[in[v]] = v;
        for (auto u : g[v]) if(depth[v] < depth[u])
        {
            head[u] = (u == heavy[v] ? head[v] : u);
            dfs_hld(u);
        }
        out[v] = t;
    }

    void bfs() {
        int k = 0; queue<int> q({ 0 }); while (!q.empty()) {
            int h = q.front(); q.pop();
            for (int i = h; i != -1; i = heavy[i]) {
                vid[i] = k++; inv[vid[i]] = i; head[i] = h;
                for (int j : g[i]) if (j != parent[i] && j != heavy[i]) q.push(j);
            }
        }
    }


    void foreach(int u, int v, function<void(int, int)> f) { // [x,y]
        if (vid[u] > vid[v]) swap(u, v); f(max(vid[head[v]], vid[u]), vid[v]);
        if (head[u] != head[v]) foreach(u, parent[head[v]], f);
    }
    int ancestor(int from, int times) {
        while (true) {
            if (depth[head[from]] > depth[from] - times) {
                times -= depth[from] - depth[head[from]] + 1; if (head[from] == 0)return -1; from = parent[head[from]];
            }
            else return inv[vid[from] - times];
        }
    }
    int lca(int u, int v) {
        if (vid[u] > vid[v]) swap(u, v); if (head[u] == head[v]) return u;
        return lca(u, parent[head[v]]);
    }
    int distance(int u, int v) { return depth[u] + depth[v] - 2 * depth[lca(u, v)]; }
    int child(int parent, int child, int times) {
        assert(depth[parent]<depth[child]);
        int d = distance(parent, child); assert(times - 1 <= d); return ancestor(child, d - times);
    }
    int go(int from, int to, int times) {
        int d = distance(from, to); assert(0 <= times and times <= d);
        int lc = lca(from, to); if (lc == to)return ancestor(from, times); if (lc == from)return child(from, to, times);
        int dd = distance(from, lc); if (dd <= times)return go(lc, to, times - dd); return ancestor(from, times);
    }
};
template<class V, int NV> struct LazySegTree { // [L,R)
#define def 0
#define ldef 0
    V comp(V l, V r) { return l + r; }
    void setLazy(int i, V v) { lazy[i] += v; }
    void push(int k, int l, int r) {
        dat[k] += lazy[k] * (r - l);
        if (r - l > 1) { setLazy(k * 2 + 1, lazy[k]); setLazy(k * 2 + 2, lazy[k]); }
        lazy[k] = ldef;
    }

    vector<V> dat, lazy;
    LazySegTree() { dat.resize(NV * 2, def); lazy.resize(NV * 2, ldef); }
    void update(int a, int b, V v, int k, int l, int r) {
        push(k, l, r); if (r <= a || b <= l) return;
        if (a <= l && r <= b) { setLazy(k, v); push(k, l, r); }
        else {
            update(a, b, v, k * 2 + 1, l, (l + r) / 2);
            update(a, b, v, k * 2 + 2, (l + r) / 2, r); dat[k] = comp(dat[k * 2 + 1], dat[k * 2 + 2]);
        }
    }
    V get(int a, int b, int k, int l, int r) {
        push(k, l, r); if (r <= a || b <= l) return def;
        if (a <= l && r <= b) return dat[k]; auto x = get(a, b, k * 2 + 1, l, (l + r) / 2);
        auto y = get(a, b, k * 2 + 2, (l + r) / 2, r); return comp(x, y);
    }
    void update(int a, int b, V v) { update(a, b, v, 0, 0, NV); }
    V get(int a, int b) { return get(a, b, 0, 0, NV); }
    void debug() {
        printf("[OH]\n");
        rep(i, 0, 32) printf("%d ", get(i, i + 1));
        printf("\n");

        /*
        set<int> que;
        rep(i, 0, 32) que.insert(i + NV - 1);
        printf("[dat]\n");
        while (1 < que.size()) {
        set<int> ne;
        for (int i : que) {
        printf("%d ", dat[i]);
        ne.insert(i / 2);
        }
        printf("\n");
        for (int i : que) {
        printf("%d ", i);
        ne.insert(i / 2);
        }
        printf("\n");
        swap(que, ne);
        }
        printf("[lazy]\n");
        que.clear();
        rep(i, 0, 32) que.insert(i + NV);
        while (1 < que.size()) {
        set<int> ne;
        for (int i : que) {
        printf("%d ", lazy[i]);
        ne.insert(i / 2);
        }
        printf("\n");
        swap(que, ne);
        }*/
    }
};
/*---------------------------------------------------------------------------------------------------
　　　　　　　　　　　 ∧＿∧  
　　　　　 ∧＿∧ 　（´<_｀ ）　 Welcome to My Coding Space!
　　　　 （ ´_ゝ`）　/　 ⌒i     
　　　　／　　　＼　 　  |　|     
　　　 /　　 /￣￣￣￣/　　|  
　 ＿_(__ﾆつ/　    ＿/ .| .|＿＿＿＿  
　 　　　＼/＿＿＿＿/　（u　⊃  
---------------------------------------------------------------------------------------------------*/





ll ans = 0;
LazySegTree<ll, 1 << 20> st;
//---------------------------------------------------------------------------------------------------
void _main() {
    int N; cin >> N;
    HLDecomposition hld(N);
    rep(i, 0, N - 1) {
        int a, b; cin >> a >> b; a--; b--;
        hld.add(a, b);
    }
    hld.build();
    st.update(0, N, 1);

    int Q; cin >> Q;
    rep(q, 0, Q) {
        int a, b; cin >> a >> b; a--; b--;

        hld.foreach(a, b, [](int x, int y) {
            ans += st.get(x, y + 1);
            st.update(x, y + 1, 1);
        });
    }
    cout << ans << endl;
}