#include<bits/stdc++.h>
using namespace std;
int n,mx=0;
int a;
int main(){
	cin>>n;
	for(int i=1;i<=n;i++){
		cin>>a;
		mx=max(mx,a);
	}
	cout<<mx<<"\n";
}

#include<iostream>
#include<iomanip>
using namespace std;
int main() {
	int n,x,maxx=0;
	 
	cin>>n;
	for(int i=1;i<=n;i++){
	
	

	cin>>x;
	
	if(x>maxx)maxx=x; 
}
	
	cout<<maxx;
	
	return 0;
}
	
	

#include <bits/stdc++.h>
using namespace std;
int main(int argc, char **argv){
	int n,mx = -1,x;
	cin >> n;
	for (int i = 0;i < n;i++){
		cin >> x;
		mx = max(mx,x);
	}
	cout << mx;
	return 0;
}

#include<bits/stdc++.h>
using namespace std;
short n,num=SHRT_MIN,sum;
int main(){
   cin>>n;
   for(int i=0;i<n;i++){
      cin>>sum;
      if(num<sum) num=sum;
   }
   printf("%d",num);
   return 0;
}

#include<iostream>
#include<iomanip>
using namespace std;
int main() {
	int n,x,maxx=0;
	cin>>n;
	for(int i=1;i<=n;i++){
	cin>>x;
	if(x>maxx)maxx=x; 
}
	cout<<maxx;
	return 0;
}

#include<bits/stdc++.h>
using namespace std;

int main () {
	int n,sum=INT_MIN; cin >> n;
	for (int i = 1; i <= n; i++) {
		int t; cin >> t;
		sum = t>sum?t:sum;
	}
	cout << sum;
	return 0;
}

#include <set>
#include <ios>
#include <list>
#include <cmath>
#include <ctime>
#include <queue>
#include <deque>
#include <stack>
#include <vector>
#include <bitset>
#include <cctype>
#include <cerrno>
#include <cwchar>
#include <cstdio>
#include <fenv.h>
#include <iosfwd>
#include <string>
#include <limits>
#include <math.h>
#include <cstdlib>
#include <iomanip>
#include <clocale>
#include <complex>
#include <cstring>
#include <cstring>
#include <cwctype>
#include <istream>
#include <ostream>
#include <sstream>
#include <fstream>
#include <utility>
#include <stdio.h>
#include <iostream>
#include <stdint.h>
#include <string.h>
#include <tgmath.h>
#include <complex.h>
#include <algorithm>
#include <exception>
#include <stdbool.h>
#include <stdexcept>
#include <streambuf>
#include <functional>
#include <inttypes.h>
#include <bits/stdc++.h>
using namespace std;
int main(){
	int n,a,maxn = 0;
	cin >> n;
	for(int i = 1;i < n;i++){
		cin >> a;
		maxn = max(maxn,a);
	}
	cout <<maxn;
	return 0;
}

#include <bits/stdc++.h>
using namespace std;
int main() {

	int n,a,b,h;
	cin>>n;
	for(b=1;b<n+1;b++)
	{
	cin>>a;
	if(a>h)
		{
	        h=a;
		}
	}
	cout<<h;
	return 0;
}