/******************************************************************************

trovare il massimo in un vettore di interi

*******************************************************************************/
#include <iostream>
#include <fstream>
#include <vector>

using namespace std;

//ifstream fin("input.txt");
//ofstream fout("output.txt");


int trova_massimo(int N, vector<int> V);

int trova_massimo(int N, vector<int> V)
{
    int max = V[0];
    for(int i=1; i<V.size(); i++)
    {
        if(V[i]>max)
        {
            max=V[i];
        }
    }
    return max;
}

int main()
{
    int N;
    cin>>N;
    vector<int> vettore;
    
    for(int i=0; i<N; i++)
    {
        int X;
        cin>>X;
        vettore.push_back(X);        
    }
    
    int max = trova_massimo(N,vettore);
    cout<<max;
    
    return 0;
}