#pragma GCC optimize("Ofast")
#pragma GCC optimize(1)
#pragma GCC optimize(2)
#pragma GCC optimize(3)
#pragma GCC target("popcnt")
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef string str;
typedef pair<ll,ll> pii;
#define F first
#define S second
#define pb push_back
#define pq priority_queue
#define all(x) (x).begin(),(x).end()
#define bug(x) cerr << (x) << '\n'
#define yn(x) cout << (x==1?"Yes\n":"No\n")
#define PI 3.14159265358979323
#define Ststone ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0)
const ll max_n=2e5+20,max_int=2147483647,mod1=1e9+7,mod2=998244353;
ll dx[8] = {1,0,0,-1,1,1,-1,-1};
ll dy[8] = {0,1,-1,0,1,-1,1,-1};
ll t,n,q,m,k,a,b,c,d,e,f,x,sum;
map<ll,ll> ans,knt;
vector<ll> v,v1,v2;
set<ll> se;
char cc;

void solve(){
    ans[0] = 0;
    cin >> n;
    for(ll i=0;i<n;i++){
        cin >> a;
        se.insert(a);
        knt[a] = knt[a]+1;
        ans[a] = (ans[a]+ans[a-1]+knt[a-1])%998244353;
    }
    ll cnt = 0;
    for(auto i:se){
        cnt = (cnt+ans[i])%998244353;
    }
    cout << cnt;
}



int main(){
    Ststone;/*
    #ifndef ONLINE_JUDGE
    freopen("input.txt","r",stdin);
    freopen("output.txt","w",stdout);
    #else
    #endif*/
    //cin >> t;
    t = 1;
    for(ll i=1;i<=t;i++){
        //cout << "Case #"<<i<<": ";
        solve();
    }
}

/*
*/