#include <bits/stdc++.h>
#define int64_t int
void solve() {
int n;
std::cin >> n;
std::vector<int64_t> a(n + 1);
for(int i = 1; i <= n; i++) {
std::cin >> a[i];
}
std::vector<int64_t> pref(n + 1);
for(int i = 1; i <= n; i++) {
pref[i] = pref[i - 1] + a[i];
}
std::vector<std::pair<int,int>> dp(n + 1, {- 1, - 1});
dp[0] = {0, 0};
for(int i = 1; i <= n; i++) {
for(int j = i - 1; j >= 0; j--) {
if(pref[i] >= pref[j] + dp[j].second) {
dp[i] = std::max(dp[i], {dp[j].first + 1, pref[j]});
}
}
if(dp[i].first == - 1) {
dp[i].first = dp[i - 1].first;
dp[i].second = dp[i - 1].second + a[i];
}
else {
dp[i].second = pref[i] - dp[i].second;
}
}
std::cout << dp[n].first;
}
signed main() {
std::ios::sync_with_stdio(false);
std::cin.tie(nullptr);
int t = 1;
//std::cin >> t;
while (t--) {
solve();
}
return 0;
}
