/*
+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+
|////|\/ /|\ \/|\\\\|////|\/ /|\ \/|\\\\|////|\/ /|\ \/|\\\\|////|\/ /|\ \/|\\\\|////|\/ /|\ \/|\\\\|////|\/ /|\ \/|\\\\|////|\/ /|\ \/|
|/// | \/ | \/ | \\\|/// | \/ | \/ | \\\|/// | \/ | \/ | \\\|/// | \/ | \/ | \\\|/// | \/ | \/ | \\\|/// | \/ | \/ | \\\|/// | \/ | \/ |
|// | \/|\/ | \\|// | \/|\/ | \\|// | \/|\/ | \\|// | \/|\/ | \\|// | \/|\/ | \\|// | \/|\/ | \\|// | \/|\/ |
|/ | \|/ | \|/ | \|/ | \|/ | \|/ | \|/ | \|/ | \|/ | \|/ | \|/ | \|/ | \|/ | \|/ |
+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+
|\ | /|\ | /|\ | /|\ | /|\ | /|\ | /|\ | /|\ | /|\ | /|\ | /|\ | /|\ | /|\ | /|\ |
|\\ | /\|/\ | //|\\ | /\|/\ | //|\\ | /\|/\ | //|\\ | /\|/\ | //|\\ | /\|/\ | //|\\ | /\|/\ | //|\\ | /\|/\ |
|\\\ | /\ | /\ | ///|\\\ | /\ | /\ | ///|\\\ | /\ | /\ | ///|\\\ | /\ | /\ | ///|\\\ | /\ | /\ | ///|\\\ | /\ | /\ | ///|\\\ | /\ | /\ |
|\\\\|/\ \|/ /\|////|\\\\|/\ \|/ /\|////|\\\\|/\ \|/ /\|////|\\\\|/\ \|/ /\|////|\\\\|/\ \|/ /\|////|\\\\|/\ \|/ /\|////|\\\\|/\ \|/ /\|
+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+
*/
#include <bits/stdc++.h>
#define fore(i, a, b) for (signed i = (a), i##_last = (b); i < i##_last; ++i)
#define fort(i, a, b) for (signed i = (a), i##_last = (b); i <= i##_last; ++i)
#define ford(i, a, b) for (signed i = (a), i##_last = (b); i >= i##_last; --i)
#define fi first
#define se second
#define pb push_back
#define sz(x) ((int)(x).size())
#define all(x) (x).begin(), (x).end()
#define rall(x) (x).rbegin(), (x).rend()
using namespace std;
using ll = long long;
using ld = long double;
template<class A, class B> bool maxi(A &a, const B &b) {return (a < b) ? (a = b, true):false;};
template<class A, class B> bool mini(A &a, const B &b) {return (a > b) ? (a = b, true):false;};
typedef unsigned long long ull;
typedef pair<int, int> ii;
typedef vector<ll> vi;
typedef vector<ii> vii;
typedef vector<vi> vvi;
typedef vector<vii> vvii;
const int maxN = 1e6 + 5;
int n, a[maxN];
ll res;
int main() {
#ifdef LOCAL
freopen("input.INP", "r", stdin);
#endif // LOCAL
cin.tie(0) -> sync_with_stdio(0);
cout.tie(0);
cin >> n;
fort(i, 1, n)
cin >> a[i];
for (ll x = 0, y = 0, l = 0, r = n + 1; l < r;) {
if (x == y) {
x = a[++l];
y = a[--r];
continue;
}
++res;
if (x < y)
x += a[++l];
else
y += a[--r];
}
cout << res << '\n';
return 0;
}
