func_code_string: #include <bits/stdc++.h>   using namespace std;   const int M = 998244353;   int main() {     long long n;     cin >> n;     map<long long, long long> mp;     long long a[200005];     for (long long i = 0; i < n; i++) {       cin >> a[i];       mp[a[i]] = i;     }     long long ans = 1, w = mp[a[0]];     for (int i = 0; i < n; i++) {       if (i > w) {         ans = (ans * 2) % M;       }       w = max(w, mp[a[i]]);     }     cout << ans;   }   