#include <bits/stdc++.h>
using namespace std;
// clang-format off
#define fi first
#define se second
#define pb push_back
#define ep emplace
#define eb emplace_back
#define lb lower_bound
#define ub upper_bound
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()
#define uniquev(v) sort(all(v)), (v).resize(unique(all(v)) - (v).begin())
#define mem(f,x) memset(f , x , sizeof(f))
#define sz(x) (int32_t)(x).size()
#define __lcm(a, b) (1ll * ((a) / __gcd((a), (b))) * (b))
#define mxx *max_element
#define mnn *min_element
#define left Kurumi_Tokisaki
#define right Kei_Karuizawa
#define next Mai_Sakurajima
#define div Yume_Irido
#define prev Chizuru_Mizuhara
#define cntbit(x) __builtin_popcountll(x)
#define MASK(x) ( 1ll << (x) )
#define Yes cout << "Yes"
#define YES cout << "YES"
#define No cout << "No"
#define NO cout << "NO"
#define AA cout << "Alice"
#define BB cout << "Bob"
/// TASK
/// -----------------------------
#ifdef LMQZZZ
void __print(int x) {cerr << x;}
void __print(long x) {cerr << x;}
void __print(long long x) {cerr << x;}
void __print(unsigned x) {cerr << x;}
void __print(unsigned long x) {cerr << x;}
void __print(unsigned long long x) {cerr << x;}
void __print(float x) {cerr << x;}
void __print(double x) {cerr << x;}
void __print(long double x) {cerr << x;}
void __print(char x) {cerr << '\'' << x << '\'';}
void __print(const char *x) {cerr << '\"' << x << '\"';}
void __print(const string &x) {cerr << '\"' << x << '\"';}
void __print(bool x) {cerr << (x ? "true" : "false");}
template<typename T, typename V>
void __print(const pair<T, V> &x) {cerr << '{'; __print(x.first); cerr << ", "; __print(x.second); cerr << '}';}
template<typename T>
void __print(const T &x) {int f = 0; cerr << '{'; for (auto &i: x) cerr << (f++ ? ", " : ""), __print(i); cerr << "}";}
void _print() {cerr << " ]\n";}
template <typename T, typename... V>
void _print(T t, V... v) {__print(t); if (sizeof...(v)) cerr << ", "; _print(v...);}
#define deb(x...) cerr << "[ in " <<__func__<< "() : line " <<__LINE__<< " ] : [ " << #x << " ] = [ "; _print(x); cerr << '\n';
#define TASK "C"
#else
#define deb(x...) 3326
#define TASK "C"
#endif
///------------------------------
void lmqzzz();
void init() {};
int32_t main() {
ios_base::sync_with_stdio(0);
cin.tie(0); cout.tie(0);
if (fopen(TASK ".inp", "r")) {
freopen(TASK ".inp", "r", stdin);
freopen(TASK ".out", "w", stdout);
}
/// =================================
constexpr bool MULTITEST = 0;
/// ================================
init();
int32_t TT = 1;
if ( MULTITEST ) cin >> TT;
for(int32_t TTT = 1; TTT <= TT; TTT ++) {
lmqzzz();
cout << '\n';
}
}
template <class T> inline T min(const T &a, const T &b, const T &c) { return min(a, min(b, c)); }
template <class T> inline T max(const T &a, const T &b, const T &c) { return max(a, max(b, c)); }
template <class T, class U> inline bool mini(T &a, const U &b) { if (a > b) { a = b; return 1; } return 0; }
template <class T, class U> inline bool maxi(T &a, const U &b) { if (a < b) { a = b; return 1; } return 0; }
constexpr int16_t dr[] = {0, 0, -1, 1};
constexpr int16_t dc[] = {1, -1, 0, 0};
constexpr int64_t MOD = 1e9 + 7;
constexpr int32_t MAXN = 1e6 + 10;
// clang-format on
void lmqzzz() {
int n;
cin >> n;
vector<int> a(n);
vector<int64_t> pref(n + 1, 0);
for (int i = 0; i < n; i++) cin >> a[i], pref[i + 1] = pref[i] + a[i];
vector<int> l(n + 1), ans(n + 1, 0);
for (int i = 1; i <= n; i++) {
l[i] = max(l[i], l[i - 1]);
ans[i] = ans[l[i]] + 1;
int nxt = lower_bound(pref.begin(), pref.end(), pref[i] * 2 - pref[l[i]]) - pref.begin();
if (nxt <= n) l[nxt] = i;
}
cout << ans[n];
}
