#if defined(LOCAL)
#include<stdc++.h>
#else
#include<bits/stdc++.h>
#endif
#include<random>
#pragma GCC optimize("Ofast")
//#pragma GCC target("avx2")
#pragma GCC optimize("unroll-loops")
using namespace std;
//#include<boost/multiprecision/cpp_int.hpp>
//#include<boost/multiprecision/cpp_dec_float.hpp>
//namespace mp=boost::multiprecision;
//#define mulint mp::cpp_int
//#define mulfloat mp::cpp_dec_float_100
struct __INIT{__INIT(){cin.tie(0);ios::sync_with_stdio(false);cout<<fixed<<setprecision(15);}} __init;
//#define INF (1<<30)
#define LINF (lint)(1LL<<56)
#define MINF (lint)(2e18)
#define endl "\n"
#define rep(i,n) for(lint (i)=0;(i)<(n);(i)++)
#define reprev(i,n) for(lint (i)=(n-1);(i)>=0;(i)--)
#define flc(x) __builtin_popcountll(x)
#define pint pair<int,int>
#define pdouble pair<double,double>
#define plint pair<lint,lint>
#define fi first
#define se second
#define all(x) x.begin(),x.end()
//#define vec vector<lint>
#define nep(x) next_permutation(all(x))
typedef long long lint;
int dx[8]={1,1,0,-1,-1,-1,0,1};
int dy[8]={0,1,1,1,0,-1,-1,-1};
const int MAX_N=3e5+5;
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;}
//vector<int> bucket[MAX_N/1000];
//constexpr int MOD=1000000007;
constexpr int MOD=998244353;
#include<atcoder/all>
using namespace atcoder;
typedef __int128_t llint;

//https://ei1333.github.io/luzhiled/snippets/structure/red-black-tree.html

template< class T >
struct ArrayPool {
  vector< T > pool;
  vector< T * > stock;
  int ptr;

  ArrayPool(int sz) : pool(sz), stock(sz) {}

  inline T *alloc() { return stock[--ptr]; }

  inline void free(T *t) { stock[ptr++] = t; }

  void clear() {
    ptr = (int) pool.size();
    for(int i = 0; i < pool.size(); i++) stock[i] = &pool[i];
  }
};

template< class D, class L, D (*f)(D, D), D (*g)(D, L), L (*h)(L, L), L (*p)(L, int) >
struct RedBlackTree {
  enum COLOR {
    BLACK, RED
  };

  struct Node {
    Node *l, *r;
    COLOR color;
    int level, cnt;
    D key, sum;
    L lazy;

    Node() {}

    Node(const D &k, const L &laz) :
        key(k), sum(k), l(nullptr), r(nullptr), color(BLACK), level(0), cnt(1), lazy(laz) {}

    Node(Node *l, Node *r, const D &k, const L &laz) :
        key(k), color(RED), l(l), r(r), lazy(laz) {}
  };

  ArrayPool< Node > pool;


  const D M1;
  const L OM0;

  RedBlackTree(int sz, const D &M1, const L &OM0) :
      pool(sz), M1(M1), OM0(OM0) { pool.clear(); }


  inline Node *alloc(const D &key) {
    return &(*pool.alloc() = Node(key, OM0));
  }

  inline Node *alloc(Node *l, Node *r) {
    auto t = &(*pool.alloc() = Node(l, r, M1, OM0));
    return update(t);
  }

  virtual Node *clone(Node *t) { return t; }

  inline int count(const Node *t) { return t ? t->cnt : 0; }

  inline D sum(const Node *t) { return t ? t->sum : M1; }

  Node *update(Node *t) {
    t->cnt = count(t->l) + count(t->r) + (!t->l || !t->r);
    t->level = t->l ? t->l->level + (t->l->color == BLACK) : 0;
    t->sum = f(f(sum(t->l), t->key), sum(t->r));
    return t;
  }

  Node *propagate(Node *t) {
    t = clone(t);
    if(t->lazy != OM0) {
      if(!t->l) {
        t->key = g(t->key, p(t->lazy, 1));
      } else {
        if(t->l) {
          t->l = clone(t->l);
          t->l->lazy = h(t->l->lazy, t->lazy);
          t->l->sum = g(t->l->sum, p(t->lazy, count(t->l)));
        }
        if(t->r) {
          t->r = clone(t->r);
          t->r->lazy = h(t->r->lazy, t->lazy);
          t->r->sum = g(t->r->sum, p(t->lazy, count(t->r)));
        }
      }
      t->lazy = OM0;
    }
    return update(t);
  }

  Node *rotate(Node *t, bool b) {
    t = propagate(t);
    Node *s;
    if(b) {
      s = propagate(t->l);
      t->l = s->r;
      s->r = t;
    } else {
      s = propagate(t->r);
      t->r = s->l;
      s->l = t;
    }
    update(t);
    return update(s);
  }

  Node *submerge(Node *l, Node *r) {
    if(l->level < r->level) {
      r = propagate(r);
      Node *c = (r->l = submerge(l, r->l));
      if(r->color == BLACK && c->color == RED && c->l && c->l->color == RED) {
        r->color = RED;
        c->color = BLACK;
        if(r->r->color == BLACK) return rotate(r, true);
        r->r->color = BLACK;
      }
      return update(r);
    }
    if(l->level > r->level) {
      l = propagate(l);
      Node *c = (l->r = submerge(l->r, r));
      if(l->color == BLACK && c->color == RED && c->r && c->r->color == RED) {
        l->color = RED;
        c->color = BLACK;
        if(l->l->color == BLACK) return rotate(l, false);
        l->l->color = BLACK;
      }
      return update(l);
    }
    return alloc(l, r);
  }

  Node *merge(Node *l, Node *r) {
    if(!l || !r) return l ? l : r;
    Node *c = submerge(l, r);
    c->color = BLACK;
    return c;
  }

  pair< Node *, Node * > split(Node *t, int k) {
    if(!t) return {nullptr, nullptr};
    t = propagate(t);
    if(k == 0) return {nullptr, t};
    if(k >= count(t)) return {t, nullptr};
    Node *l = t->l, *r = t->r;
    pool.free(t);
    if(k < count(l)) {
      auto pp = split(l, k);
      return {pp.first, merge(pp.second, r)};
    }
    if(k > count(l)) {
      auto pp = split(r, k - count(l));
      return {merge(l, pp.first), pp.second};
    }
    return {l, r};
  }

  Node *build(int l, int r, const vector< D > &v) {
    if(l + 1 >= r) return alloc(v[l]);
    return merge(build(l, (l + r) >> 1, v), build((l + r) >> 1, r, v));
  }

  Node *build(const vector< D > &v) {
    //pool.clear();
    return build(0, (int) v.size(), v);
  }

  void dump(Node *r, typename vector< D >::iterator &it, L lazy) {
    if(r->lazy != OM0) lazy = h(lazy, r->lazy);
    if(!r->l || !r->r) {
      *it++ = g(r->key, lazy);
      return;
    }
    dump(r->l, it, lazy);
    dump(r->r, it, lazy);
  }

  vector< D > dump(Node *r) {
    vector< D > v((size_t) count(r));
    auto it = begin(v);
    dump(r, it, OM0);
    return v;
  }

  string to_string(Node *r) {
    auto s = dump(r);
    string ret;
    for(int i = 0; i < s.size(); i++) {
      ret += std::to_string(s[i]);
      ret += ", ";
    }
    return (ret);
  }

  void insert(Node *&t, int k, const D &v) {
    auto x = split(t, k);
    t = merge(merge(x.first, alloc(v)), x.second);
  }

  D erase(Node *&t, int k) {
    auto x = split(t, k);
    auto y = split(x.second, 1);
    auto v = y.first->key;
    pool.free(y.first);
    t = merge(x.first, y.second);
    return v;
  }

  D query(Node *&t, int a, int b) {
    auto x = split(t, a);
    auto y = split(x.second, b - a);
    auto ret = sum(y.first);
    t = merge(x.first, merge(y.first, y.second));
    return ret;
  }

  void set_propagate(Node *&t, int a, int b, const L &pp) {
    auto x = split(t, a);
    auto y = split(x.second, b - a);
    y.first->lazy = h(y.first->lazy, pp);
    t = merge(x.first, merge(propagate(y.first), y.second));
  }

  void set_element(Node *&t, int k, const D &x) {
    if(!t->l) {
      t->key = t->sum = x;
      return;
    }
    t = propagate(t);
    if(k < count(t->l)) set_element(t->l, k, x);
    else set_element(t->r, k - count(t->l), x);
    t = update(t);
  }

  int size(Node *t) {
    return count(t);
  }

  bool empty(Node *t) {
    return !t;
  }

  Node *makeset() {
    return (nullptr);
  }
};

using mint=modint998244353;

inline vector<mint> dd(vector<mint> a,vector<mint> b){
    vector<mint> ret(5);
    rep(i,5) ret[i]=a[i]+b[i];
    return ret;
}
inline vector<mint> dl(vector<mint> a,vector<mint> b){
    vector<mint> ret(5);
    ret[0]=a[0]*b[0]+a[1]*b[1];
    ret[1]=a[0]*b[2]+a[1]*b[3];
    ret[2]=a[2]*b[0]+a[3]*b[1];
    ret[3]=a[2]*b[2]+a[3]*b[3];
    ret[4]=a[4];
    return ret; //D
}

inline vector<mint> ll(vector<mint> a,vector<mint> b){
    vector<mint> ret(4);
    ret[0]=a[0]*b[0]+a[1]*b[2];
    ret[1]=a[0]*b[1]+a[1]*b[3];
    ret[2]=a[2]*b[0]+a[3]*b[2];
    ret[3]=a[2]*b[1]+a[3]*b[3];
    return ret;
}
inline vector<mint> none(vector<mint> a,int b){
    return a;
}

template<typename U = unsigned, int B = 32>
class lazy_binary_trie {
    struct node {
        int cnt;
        U lazy;
        node *ch[2];
        node() : cnt(0), lazy(0), ch{ nullptr, nullptr } {}
    };
    void push(node* t, int b) {
        if ((t->lazy >> (U)b) & (U)1) swap(t->ch[0], t->ch[1]);
        if (t->ch[0]) t->ch[0]->lazy ^= t->lazy;
        if (t->ch[1]) t->ch[1]->lazy ^= t->lazy;
        t->lazy = 0;
    }
    node* add(node* t, U val, int b = B - 1) {
        if (!t) t = new node;
        t->cnt += 1;
        if (b < 0) return t;
        push(t, b);
        bool f = (val >> (U)b) & (U)1;
        t->ch[f] = add(t->ch[f], val, b - 1);
        return t;
    }
    node* sub(node* t, U val, int b = B - 1) {
        assert(t);
        t->cnt -= 1;
        if (t->cnt == 0) return nullptr;
        if (b < 0) return t;
        push(t, b);
        bool f = (val >> (U)b) & (U)1;
        t->ch[f] = sub(t->ch[f], val, b - 1);
        return t;
    }
    U get_min(node* t, U val, int b = B - 1) {
        assert(t);
        if (b < 0) return 0;
        push(t, b);
        bool f = (val >> (U)b) & (U)1; f ^= !t->ch[f];
        return get_min(t->ch[f], val, b - 1) | ((U)f << (U)b);
    }
    U get(node* t, int k, int b = B - 1) {
        if (b < 0) return 0;
        push(t, b);
        int m = t->ch[0] ? t->ch[0]->cnt : 0;
        return k < m ? get(t->ch[0], k, b - 1) : get(t->ch[1], k - m, b - 1) | ((U)1 << (U)b);
    }
    int count_lower(node* t, U val, int b = B - 1) {
        if (!t || b < 0) return 0;
        push(t, b);
        bool f = (val >> (U)b) & (U)1;
        return (f && t->ch[0] ? t->ch[0]->cnt : 0) + count_lower(t->ch[f], val, b - 1);
    }
    node *root;
public:
    lazy_binary_trie() : root(nullptr) {}
    int size() const {
        return root ? root->cnt : 0;
    }
    bool empty() const {
        return !root;
    }
    void insert(U val) {
        root = add(root, val);
    }
    void erase(U val) {
        root = sub(root, val);
    }
    void xor_all(U val) {
        if (root) root->lazy ^= val;
    }
    U max_element(U bias = 0) {
        return get_min(root, ~bias);
    }
    U min_element(U bias = 0) {
        return get_min(root, bias);
    }
    int lower_bound(U val) { // return id
        return count_lower(root, val);
    }
    int upper_bound(U val) { // return id
        return count_lower(root, val + 1);
    }
    U operator[](int k) {
        assert(0 <= k && k < size());
        return get(root, k);
    }
    int count(U val) {
        if (!root) return 0;
        node *t = root;
        for (int i = B - 1; i >= 0; i--) {
            push(t, i);
            t = t->ch[(val >> (U)i) & (U)1];
            if (!t) return 0;
        }
        return t->cnt;
    }
};

using T = RedBlackTree<vector<mint>,vector<mint>,dd,dl,ll,none>;
T RBT(2000000,vector<mint>{0,0,0,0,0},vector<mint>{1,0,0,1});
vector<T::Node*> t;

mint ans=0;
int N;
vector<int> edge[100005];
int sub_size[100005];
mint pow2[100005];
lint A[100005];
int pt[100005];
vector<lazy_binary_trie<int,30>> bt(100000);
vector<lazy_binary_trie<int,30>*> bt_pt(100000); 

bool merge(int left,int right){
    int rev=false;
    if(RBT.size(t[left])<RBT.size(t[right])) swap(t[left],t[right]),swap(bt_pt[left],bt_pt[right]),rev=true; //マージテク
    vector<vector<mint>> adds;
    int N=RBT.size(t[right]);
    rep(i,N){ //key未満
        vector<mint> now=RBT.query(t[right],i,i+1);
        int key=now[4].val();
        int hi=bt_pt[left]->lower_bound(key);
        vector<mint> lo_sum=RBT.query(t[left],0,hi);
        mint dp1=now[0]*lo_sum[0];
        mint dp2=now[0]*lo_sum[1]+now[1]*lo_sum[0];
        mint dp1_key=dp1*key;
        mint dp2_key=dp2*key;
        adds.push_back({dp1,dp2,dp1_key,dp2_key,key});
    }
    int before=0;
    mint sum[2];
    rep(i,N){
        vector<mint> now=RBT.query(t[right],i,i+1);
        int key=now[4].val();
        int hi=bt_pt[left]->lower_bound(key);
        if(before!=hi) RBT.set_propagate(t[left],before,hi,{sum[0],0,sum[1],sum[0]});
        sum[0]+=now[0],sum[1]+=now[1];
        before=hi;
    }
    if(before!=RBT.size(t[left])) RBT.set_propagate(t[left],before,RBT.size(t[left]),{sum[0],0,sum[1],sum[0]});
    for(auto e:adds){
        int key=e[4].val();
        int hi=bt_pt[left]->lower_bound(key);
        if(bt_pt[left]->count(e[4].val())){
            vector<mint> res=RBT.query(t[left],hi,hi+1);
            rep(i,4) res[i]+=e[i];
            RBT.set_element(t[left],hi,res);
        }
        else{
            RBT.insert(t[left],hi,e);
            bt_pt[left]->insert(e[4].val());
        }
    }
    return rev;
}

void dfs(int now,int par){
    for(auto e:edge[now]){
        if(e==par) continue;
        dfs(e,now);
        sub_size[now]+=sub_size[e];
        if(bt_pt[e]->count(0)){
            vector<mint> zero=RBT.query(t[e],0,1);
            zero[0]+=pow2[sub_size[e]-1];
            RBT.set_element(t[e],0,zero);
        }
        else{
            RBT.insert(t[e],0,{pow2[sub_size[e]-1],0,0,0,0});
            bt_pt[e]->insert(0);
        }
        merge(now,e);
    }
    ans+=RBT.query(t[pt[now]],0,RBT.size(t[pt[now]]))[3]*pow2[N-1-sub_size[now]+(now==0)];
}

int main(void){
    cin >> N;
    rep(i,N) cin >> A[i];
    rep(i,N) sub_size[i]=1;
    pow2[0]=1;
    rep(i,100004) pow2[i+1]=pow2[i]*2;
    rep(i,100004) pt[i]=i;
    rep(i,N) bt_pt[i]=&bt[i];
    rep(i,N){
        T::Node* tt=RBT.makeset();
        RBT.insert(tt,0,{1,1,A[i],A[i],A[i]});
        t.push_back(tt);
        bt_pt[i]->insert(A[i]);
    }
    rep(i,N-1){
        int u,v;
        cin >> u >> v;
        u--,v--;
        edge[u].push_back(v);
        edge[v].push_back(u);
    }
    dfs(0,-1);
    int sum1=0,sum2=0;
    rep(i,N){
        sum1+=RBT.size(t[i]);
        sum2+=bt_pt[i]->size();
    }
    cout << ans.val() << endl;
}