#include <algorithm>
#include <iostream>
#include <queue>
using namespace std;
typedef long long ll;

const ll MOD = 998244353;

ll modpow(ll x, ll n){
    ll res = 1, r = x;
    while(n){
        if(n & 1) res = res * r % MOD;
        r = r * r % MOD;
        n >>= 1;
    }
    return res;
}

struct Tree
{
    int n;
    int r;
    int l;
    std::vector<std::vector<int>> prit;
    std::vector<std::vector<int>> t;
    std::vector<int> par;
    std::vector<int> dpt;
    std::vector<int> tour;
    std::vector<std::vector<int>> appear_on_tour;
    std::vector<std::vector<int>> anc;
    
    Tree(){}
    
    Tree(int n) : n(n){
        prit.resize(n);
        t.resize(n);
        par.resize(n);
        dpt.resize(n);
    }
    
    void add_edge(int u, int v){
        prit[u].push_back(v);
        prit[v].push_back(u);
    }
    
    void build(int r_){
        r = r_;
        for(int i = 0; i < n; i++) dpt[i] = -1;
        std::queue<int> que;
        par[r] = -1;
        dpt[r] = 0;
        que.push(r);
        while(que.size()){
            int u = que.front();
            que.pop();
            for(int v : prit[u]){
                if(dpt[v] == -1){
                    t[u].push_back(v);
                    par[v] = u;
                    dpt[v] = dpt[u] + 1;
                    que.push(v);
                }
            }
        }
    }
    
    void rebuild(int r_){
        for(int u = 0; u < n; u++) t[u].clear();
        build(r_);
    }
    
    std::vector<int> toposort(){
        std::vector<std::pair<int, int>> p(n);
        for(int i = 0; i < n; i++) p[i] = std::pair<int, int>(dpt[i], i);
        sort(p.begin(), p.end(), std::greater<std::pair<int, int>>());
        std::vector<int> res(n);
        for(int i = 0; i < n; i++) res[i] = p[i].second;
        return res;
    }
    
    void dfs(int u, int &k){
        appear_on_tour[u].push_back(k);
        tour[k++] = u;
        for(int v : t[u]){
            dfs(v, k);
            appear_on_tour[u].push_back(k);
            tour[k++] = u;
        }
    }
    
    void build_euler_tour(){
        tour.resize(n * 2 - 1);
        appear_on_tour.resize(n);
        int k = 0;
        dfs(r, k);
    }
    
    void build_lca(){
        for(l = 1; l <= n; l++){
            if((1 << (l - 1)) >= n) break;
        }
        anc.resize(l);
        for(int j = 0; j < l; j++) anc[j].resize(n);
        for(int i = 0; i < n; i++) anc[0][i] = par[i];
        for(int j = 1; j < l; j++){
            for(int i = 0; i < n; i++){
                if(anc[j - 1][i] == -1) anc[j][i] = -1;
                else anc[j][i] = anc[j - 1][anc[j - 1][i]];
            }
        }
    }
    
    int lca(int u, int v){
        if(dpt[u] < dpt[v]) std::swap(u, v);
        int dpt_diff = dpt[u] - dpt[v];
        for(int j = l - 1; j >= 0; j--){
            if((dpt_diff >> j) & 1) u = anc[j][u];
        }
        if(u == v) return u;
        for(int j = l - 1; j >= 0; j--){
            if(anc[j][u] != anc[j][v]){
                u = anc[j][u];
                v = anc[j][v];
            }
        }
        return anc[0][u];
    }
};

void dfs(int u, int n, ll &s, ll *c, Tree &t){
    for(int v : t.t[u]){
        s = (s + c[v] * (n - c[v])) % MOD;
        dfs(v, n, s, c, t);
    }
}

int main()
{
    int n;
    cin >> n;
    Tree t(n);
    for(int i = 0; i < n - 1; i++){
        int u, v;
        cin >> u >> v;
        u--; v--;
        t.add_edge(u, v);
    }
    t.build(0);
    ll c[100005]{0};
    vector<int> p = t.toposort();
    for(int i = 0; i < n; i++){
        int u = p[i];
        c[u] = 1;
        for(int v : t.t[u]) c[u] += c[v];
    }
    ll s = 0;
    dfs(0, n, s, c, t);
    cout << (1 + MOD - s * modpow(n * (n - 1) * (n - 1) / 2 % MOD, MOD - 2) % MOD) % MOD << endl;
}