#include <iostream>
#include<bits/stdc++.h>
using namespace std;
bool cmp(double a,double b){
    return a>b;
}
double a[10005];
int main(){
    int n;
    int result;
    while(scanf("%d",&n)!=EOF){
        for(int i=0;i<n;i++){
            scanf("%lf",&a[i]);
        }
        sort(a,a+n,cmp);
        result=(int)a[0];
        printf("%d\n",result);
    }
    return 0;
}