#include <bits/stdc++.h>
using namespace std;
#ifdef LOCAL
#include "debug.h"
#else
#define dbg(...) 47
#endif
#define int long long
signed main() {
ios::sync_with_stdio(false);
cin.tie(nullptr);
int n;
cin >> n;
vector<int> a(n);
for (int i = 0; i < n; i++) {
cin >> a[i];
}
vector<int> p(n + 1);
for (int i = 0; i < n; i++) {
p[i + 1] = p[i] + a[i];
}
vector<array<int, 2>> dp(n + 1);
dp[0][0] = 1;
for (int i = 1; i <= n; i++) {
dp[i] = max(dp[i], dp[i - 1]);
int j = lower_bound(p.begin() + i + 1, p.end(), p[i] * 2 - dp[i][1]) - p.begin();
if (j <= n) {
dp[j] = max(dp[j], {dp[i][0] + 1, p[i]});
}
}
cout << dp[n][0] << '\n';
return 0;
}
