#include<bits/stdc++.h>
using namespace std;
int n,a;
inline int read()
{
    int x=0,f=1;
    char ch=getchar();
    while(ch<'0'||ch>'9')
    {
        if(ch=='-') f=-1;
        ch=getchar();
    }
    while(ch>='0'&&ch<='9') x=x*10+ch-'0',ch=getchar();
    return x*f;
}
int main()
{
	n=read();
	for(int i=0;i<=n;i++)
	{
		a=read();
		if(i==n) printf("%d",a);
	}
	return 0;
}