#include<iostream>
#include<algorithm>
using namespace std;
int main(){
    int n,a[105];
    scanf("%d",&n);
    for(int i=1;i<=n;i++)scanf("%d",&a[i]);
    sort(a+1,a+n+1);
    for(int i=n;i>=1;i--){
    	if(a[n]!=a[i]){
    		printf("%d",a[i]);
    		break;
		}
	}
    return 0;
}