#include<iostream>
using namespace std;
int n,x,sum,num;
int main(){
    cin>>n;
    for(int i=1;i<=n;i++){
        cin>>x;
        if(i%2==0) num+=x;
        else sum+=x;
    }
    cout<<sum<<endl<<num<<endl<<abs(sum-num);
    return 0;
}