#include
using namespace std;
void maximum1 (int arr1[],int N){
int maxvalue1 = arr1[0];
for(int i=1;i<N;++i){
if(arr1[i]>maxvalue1){
maxvalue1=arr1[i];
}
}
cout<<maxvalue1<<endl;
}
int main() {
int N;
cin>>N;
int arr[100];
for(int i=0;i<N;i++){
cin>>arr[i];
}
maximum1(arr,N);
return 0;
}