// Success consists of going from failure to failure without loss of enthusiasm
#include <bits/stdc++.h>
using namespace std;
#define nl '\n'
#define f first
#define s second
#define mp make_pair
#define pb push_back
template<class T> using V = vector<T>;
using ll = long long;
using pl = pair<ll, int>;
int main() {
cin.tie(0)->sync_with_stdio(0);
int N; cin >> N;
V<int> A(N); for(auto& x : A) cin >> x;
V<ll> P = {0}; for(auto& x : A) P.pb(P.back() + x);
V<int> ans(N + 1, 0);
set<pl> S = {mp(0, 0)};
for(int i = 1; i <= N; i++) {
// FIND l such that P[l] + SUM[l] <= P[i]
pl p = *prev(S.upper_bound(mp(P[i], N + 1)));
// cout << P[i] << " " << p.f << " " << p.s << nl;
int l = p.s;
int sum = P[i] - P[l];
ans[i] = ans[l] + 1;
// cout << i << " " << l << " " << sum << " " << ans[i] << nl;
S.insert(mp(sum + P[i], i));
}
cout << *max_element(begin(ans), end(ans)) << nl;
return 0;
}
