#include <stdio.h>
long n,i,a[100000],max,st,p1[100000],p2[100000],s[100000],k;
int main()
{
    freopen("oo.in","r",stdin);
    freopen("oo.out","w",stdout);
    scanf("%d",&n);
    for(i=1;i<=n;i++)
     scanf("%d",&a[i]);
    k=1;
    s[1]=a[1]+a[n];
    p1[1]=1;
    p2[1]=n;
    for(i=1;i<=n-1;i++)
     {
            k=k+1;
            s[k]=a[i]+a[i+1];
            p1[k]=i;
            p2[k]=i+1;
     }
       
       printf("%d",st);
       return 0;
}