#include <cstdio>
#include <cstring>
#include <iostream>
#include <string>
#include <cmath>
#include <bitset>
#include <vector>
#include <map>
#include <set>
#include <queue>
#include <deque>
#include <algorithm>
#include <complex>
#include <unordered_map>
#include <unordered_set>
#include <random>
#include <cassert>
#include <fstream>
#include <utility>
#include <functional>
#include <time.h>
#include <stack>
#include <array>
#include <list>
#include <atcoder/all>
#define popcount __builtin_popcount
using namespace std;
using namespace atcoder;
typedef long long ll;
typedef pair<int, int> P;
int n;
vector<int> g[100010];
int c[100010];
using mint=modint998244353;
mint ans;
mint t;
void dfs(int x, int p){
	c[x]=1;
	for(auto y:g[x]){
		if(y==p) continue;
		dfs(y, x);
		c[x]+=c[y];
		ans+=mint(c[y])*mint(n-c[y])*t;
	}

}
int main()
{
    cin>>n;
	t=mint(n)*mint(n-1)/mint(2)*mint(n-1);
	t=t.inv();
	for(int i=0; i<n-1; i++){
		int a, b;
		cin>>a>>b;
		a--; b--;
		g[a].push_back(b);
		g[b].push_back(a);
	}
	dfs(0, -1);
	ans=1-ans;
	cout<<ans.val()<<endl;
    return 0;
}