#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; using mint=modint998244353; template<typename T> struct BIT{ vector<T> bit; int size; BIT(int n):size(n), bit(n+1, 0){} T sum(int i){ //[0, i) T s=0; while(i>0){ s+=bit[i]; i-=(i&(-i)); } return s; } T sum(int l, int r){ //[l, r) return sum(r)-sum(l); } void add(int i, T x){ i++; while(i<=size){ bit[i]+=x; i+=(i&(-i)); } } }; template<typename Monoid, typename OperatorMonoid=Monoid> struct LazySegmentTree{ using F=function<Monoid(Monoid, Monoid)>; using G=function<Monoid(Monoid, OperatorMonoid, int)>; using H=function<OperatorMonoid(OperatorMonoid, OperatorMonoid)>; int sz; vector<Monoid> data; vector<OperatorMonoid> lazy; const F f; const G g; const H h; const Monoid e1; const OperatorMonoid e0; LazySegmentTree(int n, const F f, const G g, const H h, const Monoid &e1, const OperatorMonoid &e0): f(f), g(g), h(h), e1(e1), e0(e0){ sz=1; while(sz<n) sz<<=1; data.resize(2*sz-1, e1); lazy.resize(2*sz-1, e0); } void build(vector<Monoid> v){ for(int i=0; i<v.size(); i++) data[i+sz-1]=v[i]; for(int i=sz-2; i>=0; i--) data[i]=f(data[2*i+1], data[2*i+2]); } void eval(int k, int l, int r){ if(lazy[k]!=e0){ data[k]=g(data[k], lazy[k], r-l); if(k<sz-1){ lazy[2*k+1]=h(lazy[2*k+1], lazy[k]); lazy[2*k+2]=h(lazy[2*k+2], lazy[k]); } } lazy[k]=e0; } void update(int a, int b, const OperatorMonoid &x, int k, int l, int r){ eval(k, l, r); if(r<=a || b<=l) return; if(a<=l && r<=b){ lazy[k]=h(lazy[k], x); eval(k, l, r); }else{ update(a, b, x, 2*k+1, l, (l+r)/2); update(a, b, x, 2*k+2, (l+r)/2, r); data[k]=f(data[2*k+1], data[2*k+2]); } } void update(int a, int b, const OperatorMonoid &x){ return update(a, b, x, 0, 0, sz); } Monoid find(int a, int b, int k, int l, int r){ eval(k, l, r); if(b<=l || r<=a) return e1; if(a<=l && r<=b) return data[k]; else return f(find(a, b, 2*k+1, l, (l+r)/2), find(a, b, 2*k+2, (l+r)/2, r)); } Monoid find(int a, int b){ return find(a, b, 0, 0, sz); } Monoid operator[](const int &k){ return find(k, k+1); } }; int n; int a[200020]; int main() { cin>>n; vector<P> v(n); for(int i=0; i<n; i++){ cin>>a[i]; v[i]=P(a[i], i); } sort(v.begin(), v.end()); BIT<int> bit(n); using Pm=pair<mint, mint>; auto f=[&](mint a, mint b){ return a+b; }; auto g=[&](mint a, Pm x, int len){ return a*x.first+x.second*len; }; auto h=[&](Pm x, Pm y){ return Pm(x.first*y.first, y.first*x.second+y.second); }; LazySegmentTree<mint, Pm> seg1(n, f, g, h, mint(0), Pm(1, 0)); LazySegmentTree<mint, Pm> seg2(n, f, g, h, mint(0), Pm(1, 0)); mint ans=0; mint inv2=mint(2).inv(); mint p2[200020], p2i[200020]; p2[0]=p2i[0]=1; for(int i=1; i<=n; i++){ p2[i]=p2[i-1]*2; p2i[i]=p2i[i-1]*inv2; } for(int z=0; z<n; z++){ int m=v[z].second; bit.add(m, 1); int c=bit.sum(m); seg2.update(m+1, n, Pm(2, 0)); seg2.update(m, m+1, Pm(0, (n-m)*p2[c])); seg1.update(m+1, n, Pm(inv2, 0)); seg1.update(m, m+1, Pm(0, (m+1)*p2i[c])); ans+=(n-m+seg2.find(m+1, n)*p2i[c]*inv2)*(m+1+seg1.find(0, m)*p2[c]*inv2)*mint(a[m]); } cout<<ans.val()<<endl; return 0; }