This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
/* Ajay Jadhav */
#include <iostream>
#include <cstdio>
#include <algorithm>
#include <deque>
#include <vector>
#include <cstdlib>
#include <iomanip>
#include <cmath>
#include <queue>
#include <map>
#include <set>
#include <stack>
#include <ctime>
#include <string.h>
#include <climits>
#include <cstring>
using namespace std;
#define ll long long
#define pb push_back
#define pii pair<int, int>
#define vi vector<int>
#define vvi vector<vi>
#define vii vector<pii>
#define mi map<int, int>
#define mii map<pii, int>
#define all(a) (a).begin(), (a).end()
#define x first
#define y second
#define sz(x) (int)x.size()
#define hell 1000000007
#define rep(i, a, b) for (int i = a; i < b; i++)
#define endl '\n'
void solve()
{
int n;
cin >> n;
vector<ll> a(n);
rep(i, 0, n)
{
cin >> a[i];
}
int l = 0, r = n - 1, ans = 0;
while (l < r)
{
if (a[l] < a[r])
{
ans++;
if (l + 1 <= r)
{
a[l + 1] += a[l];
}
l++;
}
else if (a[l] > a[r])
{
ans++;
if (r - 1 >= l)
{
a[r - 1] += a[r];
}
r--;
}
else
{
l++;
r--;
}
}
cout << ans << endl;
}
signed main()
{
ios::sync_with_stdio(false);
cin.tie(0);
cout.tie(0);
int t = 1;
// cin>>t;
while (t--)
{
solve();
}
return 0;
}
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