#include <bits/stdc++.h>
using namespace std;
const long long MOD = 998244353;
long long modpow(long long a, long long b){
	long long ans = 1;
	while (b > 0){
		if (b % 2 == 1){
			ans *= a;
			ans %= MOD;
		}
		a *= a;
		a %= MOD;
		b /= 2;
	}
	return ans;
}
long long modinv(long long a){
	return modpow(a, MOD - 2);
}
int main(){
  int N;
  cin >> N;
  vector<vector<int>> E(N);
  for (int i = 0; i < N - 1; i++){
    int u, v;
    cin >> u >> v;
    u--;
    v--;
    E[u].push_back(v);
    E[v].push_back(u);
  }
  vector<int> p(N, -1);
  vector<vector<int>> c(N);
  queue<int> Q;
  Q.push(0);
  vector<int> bfs;
  while (!Q.empty()){
    int v = Q.front();
    Q.pop();
    bfs.push_back(v);
    for (int w : E[v]){
      if (w != p[v]){
        p[w] = v;
        c[v].push_back(w);
        Q.push(w);
      }
    }
  }
  reverse(bfs.begin(), bfs.end());
  vector<int> dp(N, 1);
  for (int v : bfs){
    for (int w : c[v]){
      dp[v] += dp[w];
    }
  }
  long long ans = 0;
  long long P = modinv((long long) N * (N - 1) % MOD);
  for (int i = 1; i < N; i++){
    long long x = 0;
    x += (long long) dp[i] * (dp[i] - 1) % MOD;
    x += (long long) (N - dp[i]) * (N - dp[i] - 1) % MOD;
    ans += x * P % MOD;
  }
  ans %= MOD;
  ans *= modinv(N - 1);
  ans %= MOD;
  cout << ans << endl;
}