#include <bits/stdc++.h>
#define ull unsigned long long
#define ll long long
#define el endl
#define nl '\n'
#define all(v) v.begin(), v.end()
using namespace std;
void input()
{
if (fopen("in.txt", "r"))
{
freopen("in.txt", "r", stdin);
freopen("out.txt", "w", stdout);
}
}
void init()
{
ios_base::sync_with_stdio(false);
cin.tie(nullptr);
}
int main()
{
Fast:
input();
init();
//---------------------------------------------------------------------------------------------------------------
int n, MaxNum = INT_MIN;
cin >> n;
int ar[n];
for (int i = 0; i < n; i++)
{
cin >> ar[i];
if (ar[i] > MaxNum)
MaxNum = ar[i];
}
cout << MaxNum << nl;
return 0;
}
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