#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
#define endl "\n"
int main()
{
ios_base::sync_with_stdio(false);
cin.tie(NULL);
cout.tie(NULL);
ll t=1;
//cin>>t;
while(t--)
{
ll n;
cin>>n;
ll a[2*n+1],i,pf[2*n+1];
a[0]=0;
pf[0]=0;
for(i=1;i<=n;i++)
{
cin>>a[i];
a[i+n]=a[i];
}
for(i=1;i<=2*n;i++)
{
pf[i]=pf[i-1]+a[i];
}
ll val=0;
ll len=n/2;
for(i=len;i<=2*n;i++)
{
val=max(val,pf[i]-pf[i-len]);
}
cout<<pf[n]-val<<endl;
}
#ifndef ONLINE_JUDGE
cerr << "Time elapsed: " << 1.0 * clock() / CLOCKS_PER_SEC << " s.\n";
#endif
return 0;
}
// Author: tryharderforioi100
