#include <bits/stdc++.h>
using namespace std;
#define F first
#define S second
#define R cin>>
#define ll long long
#define ln cout<<'\n'
#define in(a) insert(a)
#define pb(a) push_back(a)
#define pd(a) printf("%.10f\n",a)
#define mem(a) memset(a,0,sizeof(a))
#define all(c) (c).begin(),(c).end()
#define iter(c) __typeof((c).begin())
#define rrep(i,n) for(ll i=(ll)(n)-1;i>=0;i--)
#define REP(i,m,n) for(ll i=(ll)(m);i<(ll)(n);i++)
#define rep(i,n) REP(i,0,n)
#define tr(it,c) for(iter(c) it=(c).begin();it!=(c).end();it++)
ll check(ll n,ll m,ll x,ll y){return x>=0&&x<n&&y>=0&&y<m;}void pr(){ln;}
template<class A,class...B>void pr(const A &a,const B&...b){cout<<a<<(sizeof...(b)?" ":"");pr(b...);}
template<class A>void PR(A a,ll n){rep(i,n)cout<<(i?" ":"")<<a[i];ln;}
const ll MAX=998244353,MAXL=1LL<<61,dx[8]={-1,0,1,0,-1,-1,1,1},dy[8]={0,1,0,-1,-1,1,1,-1};
typedef pair<ll,ll> P;

int n;
vector<P> v[100001];
int solve(int i,int p) {
  if(v[i].size()==1&&v[i][0].F==p) {
    v[i][0].S=n-1;
    return 1;
  }
  int q=0,k=-1;
  for(int j=0; j<v[i].size(); j++) {
    if(v[i][j].F!=p) {
      if(v[i][j].S==-1) {
        v[i][j].S=solve(v[i][j].F,i);
        q+=v[i][j].S;
      } else q+=v[i][j].S;
    } else k=j;
  }
  if(k!=-1) v[i][k].S=n-1-q;
  return q+1;
}

void extended_euclid(ll x,ll y,ll *c,ll *a,ll *b){
  ll a0,a1,a2,b0,b1,b2,r0,r1,r2,q;r0=x;r1=y;a0=1;a1=0;b0=0;b1=1;
  while(r1>0){q=r0/r1;r2=r0%r1;a2=a0-q*a1;b2=b0-q*b1;r0=r1;r1=r2;a0=a1;a1=a2;b0=b1;b1=b2;}
  *c=r0;*a=a0;*b=b0;
}

ll get_inv(ll n, ll p){
  ll a,b,c;
  extended_euclid(n,p,&c,&a,&b);
  if(a<p) a+=p;
  return a%p;
}

void Main() {
  cin >> n;
  rep(i,n-1) {
    ll x,y;
    cin >> x >> y;
    x--,y--;
    v[x].pb(P(y,-1));
    v[y].pb(P(x,-1));
  }
  solve(0,-1);
  ll ans=0;
  ll sum=n*(n-1)%MAX*(n-1)%MAX*get_inv(2,MAX)%MAX;
  rep(i,n) {
    rep(j,v[i].size()) {
      ll c=v[i][j].S;
      ll d=n-c;
      ans+=c*d;
      ans%=MAX;
    }
  }
  ans*=get_inv(2,MAX);
  ans%=MAX;
  ans=(sum-ans+MAX)%MAX;
  pr(ans*get_inv(sum,MAX)%MAX);
}

int main(){ios::sync_with_stdio(0);cin.tie(0);Main();return 0;}