#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
const int c=2e5+5;

int n;
ll arr[c];
ll suf[c];

bool check(ll k){
    ll cur=0;
    for(int i=1;i<=n;i++){
        ll le=(cur+arr[i]-k+1)/2;
        if(le>min(arr[i],cur)) return 0;
        cur=cur+arr[i]-2*max(0ll,le);
    }
    return 1;
}

bool jo(ll k){
    bool res = check(k);
    reverse(arr+1,arr+n+1);
    res &= check(k);
    reverse(arr+1,arr+n+1);
    return res;
}

int main(){
    ios_base::sync_with_stdio(false);
    cin.tie(0);

    cin>>n;
    for(int i=1;i<=n;i++){
        cin>>arr[i];
    }

    cout << check(576170439-1000) << endl;

    ll l=0,r=1e15;
    while(l<r-1){
        ll mid=l+r>>1;
        if(jo(mid)) r=mid;
        else l=mid;
    }
    cout << r << endl;

    for(int i=n;i>0;i--) suf[i]=suf[i+1]+arr[i];

    ll sum=0;
    ll maxi=0;
    for(int i=1;i<=n;i++){
        if(suf[i+1]>=sum+arr[i]){
            sum+=arr[i];
            maxi=sum;
        }
        else{
            maxi=max(suf[i+1],maxi);
            break;
        }
    }
    cout << maxi << endl;
}