Baekjoon #11055

#include<bits/stdc++.h>

using namespace std;

int main(){
    ios::sync_with_stdio(false);
    cin.tie(0);

    int N; cin >> N;
    vector<int> V(N), DP(N);
    for(auto &i: V) cin >> i;
    for(int i=0;i<N;i++) {
        DP[i] = V[i];
        for(int j=0;j<i;j++) {
            if(V[i] > V[j]) {
                DP[i] = max(DP[i], DP[j] + V[i]);
            }
        }
    }
    cout << *max_element(DP.begin(), DP.end());

    return 0;
}

import java.util.*;
import java.io.*;
import java.lang.*;

public class Main{
	public static void main(String[] args){
        FastReader rd = new FastReader();

        int N = rd.nextInt();
        int[] DP = new int[N + 1];
        int[] arr = new int[N + 1];

        for(int i = 1; i <= N; ++i) {
            arr[i] = rd.nextInt();
        }

        int ans = 0;
        for(int i = 1; i <= N; ++i) {
            for(int j = 1; j < i; ++j) {
                if(arr[j] < arr[i]) {
                    DP[i] = Math.max(DP[i], DP[j]);
                }
            }
            DP[i] += arr[i];
            ans = Math.max(ans, DP[i]);
        }

        System.out.println(ans);
	}

    static class FastReader {
        BufferedReader br;
        StringTokenizer st;

        public FastReader() {
            br = new BufferedReader(new InputStreamReader(System.in));
        }

        String next() {
            while(st == null || !st.hasMoreElements()) {
                try {
                    st = new StringTokenizer(br.readLine());
                }
                catch (IOException e) {
                    e.printStackTrace();
                }
            }
            return st.nextToken();
        }

        int nextInt() { return Integer.parseInt(next()); }
        long nextLong() { return Long.parseLong(next()); }
        double nextDouble() { return Double.parseDouble(next()); }
        String nextLine() {
            String str = "";
            try {
                str = br.readLine();
            }
            catch (IOException e) {
                e.printStackTrace();
            }
            return str;
        }
    }
}