#include <bits/stdc++.h>
using namespace std;

#include "atcoder/all"
using namespace atcoder;
using Mint = modint998244353;

int N;
vector<vector<int>> G;
Mint ans = 0;

int maine(int now = 0, int par = -1) {
    int ret = 1;
    for (auto&& nxt : G[now]) {
        if (par == nxt)
            continue;
        ret += maine(nxt, now);
    }
    if (par != -1)
        ans += Mint{ret} * (ret - 1) + Mint{N - ret} * (N - ret - 1);
    return ret;
}

int main() {
    cin >> N;
    G.resize(N);
    for (int i = 0; i < N - 1; i++) {
        int u, v;
        cin >> u >> v;
        u--;
        v--;
        G[u].emplace_back(v);
        G[v].emplace_back(u);
    }

    maine();
    cout << (ans / N / (N - 1) / (N - 1)).val() << endl;
}