#include <iostream>
#include <cmath>
using namespace std;
int main()
{
    int a[100000],i,j=0,k=0,l=0,n;
    cin>>n;
    for(i=1;i<=n;i++)cin>>a[i];
    for(i=1;i<=n;i++)
    {if((i%2)==0)l=l+a[i];
    else k=k+a[i];
    }
    j=abs(k-l);
    cout<<k<<endl<<l<<endl<<j<<endl;
    return 0;
}
/**************************************************************
	Problem: 2039
	User: linmiaoling
	Language: C++
	Result: Accepted
	Time:29 ms
	Memory:2340 kb
****************************************************************/