Create the jewellery

#include <bits/stdc++.h>
#define ll long long
#define pb push_back
#define vll vector<ll>
using namespace std;

int main(){
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    int n;
    cin >> n;
    vll v;
    for(int i = 0; i < n; i++){
        ll x;
        cin >> x;
        v.pb(x);
    }
    pair<int, int> dp[n];
    int l = 0;
    for(int i = 0; i < n; i++){
        dp[i] = {1, 1};
    }
    for(int i = n-1; i >= 0; i--){
        if(i == n-1){
            dp[i] = {1, 1};
            l = 1;
        } else{
            for(int j = i+1; j < n; j++){
                if(v[i] > v[j]){
                    if(dp[i].first <= dp[j].first){
                        dp[i].first = 1+dp[j].first;
                    }
                } else{
                    if(dp[i].second <= dp[j].second){
                        dp[i].second = 1+dp[j].second;
                    }
                }
            }
            l = max(l, dp[i].first+dp[i].second-1);
        }
    }
    cout << l << "\n";
    return 0;
}