#include <iostream>
#include <vector>
#include <string>
#include <algorithm>
#include <map>
using namespace std;

int lsb(int x){
    return x & (-x);
}
typedef long long ll;
#define MODX 998244353

class FenwickTree{
public:
    ll * B; 
    int n;
    FenwickTree(int n){
        this->n = n;
        this->B = new ll[n+3];
        for(int i = 0; i <= n+1; ++i)
            this->B[i] = 0;
    }
    ll getsum(int index){
        ll sum = 0;
        index = index + 1;
        while(index > 0){
            sum = (this->B[index] + sum) % MODX;
            index -= lsb(index);
        }
        return sum;
    }
    void update(int index, ll val){
        index = index + 1;
        while(index <= n){
            this->B[index] =  (this->B[index] + val ) %MODX;
            index += lsb(index);
        }
    }

};
ll add(ll x, ll y){
    return (x+y)%MODX;
}

ll mul(ll x, ll y){
    return (x*y)%MODX;
}

void CoordinateCompress(vector<int> u, vector<int> & v){
    sort(u.begin(),u.end()); 
    map<int,int> mpitoind;
    int n = u.size();
    for(int i = 0; i< n; ++i)
        mpitoind[u[i]] = i;
    for(int i = 0; i < n; ++i)
        v[i] = mpitoind[v[i]];
}

int main()
{
   
    int n; 
    cin >> n;
    vector<int> a; vector<int> b;
    for(int i = 0; i< n; ++i){
        int x; cin >> x; a.push_back(x);
        b.push_back(x);
    }
    CoordinateCompress(a,a);
    FenwickTree * presum = new FenwickTree(n+2);
    FenwickTree * f = new FenwickTree(n+2);
    FenwickTree * g = new FenwickTree(n+2);
    FenwickTree * c = new FenwickTree(n+2);
    FenwickTree * gp = new FenwickTree(n+2);
    for(int i = n-1; i >= 0; --i){
        ll nf = 1, ng = 0, nc = 0, ngp = 0;
        if(a[i] - 1 >= 0){
            ll frequency = f->getsum(a[i]-1);
            ll pres = presum->getsum(a[i]-1);
            ng = add( mul(frequency, b[i]) , pres);
            nc = frequency;
            ll frequency2 = c->getsum(a[i]-1);
            ll pres2 = g->getsum(a[i]-1);
            ngp = add( mul(frequency2, b[i]) , pres2);
        }
        presum->update(a[i], b[i]);
        f->update(a[i], nf);
        g->update(a[i], ng);
        c->update(a[i], nc);
        gp->update(a[i], ngp);        
    }
    cout << gp->getsum(n);
    return 0;
}