Submission #877121

#	Time	Username	Problem	Language	Result	Execution time	Memory
877121		auslander	Bigger segments (IZhO19_segments)	C++17	0 / 100	1 ms	2396 KiB

segments

#include <algorithm>
#include <iostream>
#include <vector>
#include <iterator>
using namespace std;
typedef long long ll;

const int N = 5e5;
ll arr[N], pref[N];

int main()
{
	ll i, j, n, m;
	cin >> n;
	for (i = 0; i < n; i++)
		cin >> arr[i];
	vector<ll>v;
	ll p = arr[0];
	ll k = 0;
	j = 0;
	ll res = 1;
	for (i = 1; i < n; i++)
	{
		k += arr[i];
		pref[j] = k;
		if (p <= k)
		{
			res++;
			vector<ll>::iterator it = upper_bound(v.begin(), v.end(), (k - p) / 2);
			if (it == v.begin())
			{
				p = k;
				k = 0;
				j = 0;
				v.erase(v.begin(), v.end());
			}
			else
			{
				p = k - pref[(it - v.begin()) - 1];
				k = 0;
				j = 0;
				v.erase(v.begin(), v.end());
			}
		}
		else
		{
			v.push_back(k);
			j++;
		}
	}
	cout << res << endl;

	return 0;
}

Compilation message (stderr)

segments.cpp: In function 'int main()':
segments.cpp:13:14: warning: unused variable 'm' [-Wunused-variable]
   13 |  ll i, j, n, m;
      |              ^

• Subtask 1: 0 / 13
• Subtask 2: 0 / 14
• Subtask 3: 0 / 10
• Subtask 4: 0 / 36
• Subtask 5: 0 / 27