#include <bits/stdc++.h>
using namespace std;
int main(){
int n;
cin>>n;
int arr[n];
for(int i=0;i<n;i++){
cin>>arr[i];
}
sort(arr,arr+n);
cout<<arr[n-1];
}
I2luY2x1ZGUgPGJpdHMvc3RkYysrLmg+CnVzaW5nIG5hbWVzcGFjZSBzdGQ7CgppbnQgbWFpbigpewoJaW50IG47CgljaW4+Pm47CglpbnQgYXJyW25dOwoJZm9yKGludCBpPTA7aTxuO2krKyl7CgkJY2luPj5hcnJbaV07Cgl9Cglzb3J0KGFycixhcnIrbik7Cgljb3V0PDxhcnJbbi0xXTsKfQoJCgkKCg==