#include <bits/stdc++.h> using namespace std; #define int long long const int INF = 1e18; const int N = 2e5 + 5; int a[N], dp[N][2], pr[N]; signed main(){ ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0); int n; cin >> n; for(int i = 1; i <= n; i++){ cin >> a[i]; pr[i] = pr[i - 1] + a[i]; dp[i][0] = -1; dp[i][1] = INF; } dp[1][0] = 1; dp[1][1] = a[1]; for(int i = 2; i <= n; i++){ for(int j = i; j >= 0; j--){ int sum = pr[i] - pr[j]; if(dp[j][0] >= dp[i][0] - 1 && dp[j][1] <= sum){ dp[i][1] = min(dp[i][1], sum); dp[i][0] = dp[j][0] + 1; break; } } } cout << dp[n][0] << endl; }