tj

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

int main()
{
    int a;
    cin>>a;
    int maxn = -1000;
    for(int i = 0;i<a;i++)
        {
            int b;
            cin>>b;
            maxn = max(maxn,b);
        }
    cout<<maxn;
}