Submission #1026046

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
1026046	2024-07-17T13:26:32 Z	fv3	Feast (NOI19_feast)	C++14	12 / 100	36 ms	8904 KB

feast

#include <bits/stdc++.h>

using namespace std;
typedef long long ll;

vector<ll> a, b;
ll res;

ll solve(ll pun)
{
	res = 0;
	ll last = -pun;
	ll seg_cnt = 0;

	for (auto n : b)
	{
		if (n > 0)
		{
			last += n;
			continue;
		}
		
		if (n < -pun)
		{
			if (last > 0)
			{
				res += last;
				seg_cnt++;
			}

			last = -pun;
		}
		else
		{
			last += n;
		}

		if (last < -pun)
			last = -pun;
	}

	if (last > 0)
	{
		res += last;
		seg_cnt++;
	}

	return seg_cnt;
}

int main()
{
	ios::sync_with_stdio(0);
	cin.tie(0);

	ll N, K;
	cin >> N >> K;
	for (int i = 0; i < N; i++)
	{
		ll n; cin >> n;
		if (n != 0)
			a.push_back(n);
	}
	N = a.size();

	{
		int i = 0;
		while (i < N && a[i] < 0) 
			i++;

		ll sum = 0;
		if (i < N) sum = a[i];
		for (i++; i < N; i++)
		{
			if ((a[i-1] ^ a[i]) < 0)
			{
				b.push_back(sum);
				sum = 0;
			}
			sum += a[i];
		}

		if (sum != 0)
			b.push_back(sum);

		if (b.size() && b.back() <= 0) 
			b.pop_back();
	}

	if (b.size() == 0)
	{
		cout << 0 << '\n';
		return 0;
	}

	ll l = 0ll; 
	ll r = 1000000000000000000ll;

	while (l < r)
	{
		ll c = (l + r) / 2ll;

		if (solve(c) > K)
			l = c + 1;
		else
			r = c;
	}

	solve(l);
	cout << res + K * l << '\n';

	return 0;
}

Subtask #1

4.0 / 4.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	24 ms	7112 KB	Output is correct
2	Correct	23 ms	7380 KB	Output is correct
3	Correct	32 ms	7380 KB	Output is correct
4	Correct	25 ms	7164 KB	Output is correct
5	Correct	22 ms	7376 KB	Output is correct
6	Correct	22 ms	7252 KB	Output is correct
7	Correct	30 ms	7112 KB	Output is correct
8	Correct	25 ms	7364 KB	Output is correct
9	Correct	23 ms	7108 KB	Output is correct
10	Correct	22 ms	7112 KB	Output is correct

Subtask #2

8.0 / 8.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	15 ms	5588 KB	Output is correct
2	Correct	14 ms	5660 KB	Output is correct
3	Correct	15 ms	5588 KB	Output is correct
4	Correct	15 ms	5768 KB	Output is correct
5	Correct	24 ms	7376 KB	Output is correct
6	Correct	14 ms	5588 KB	Output is correct
7	Correct	15 ms	5588 KB	Output is correct
8	Correct	23 ms	7368 KB	Output is correct
9	Correct	22 ms	7380 KB	Output is correct
10	Correct	15 ms	5844 KB	Output is correct

Subtask #3

0 / 18.0

#	Verdict	Execution time	Memory	Grader output
1	Incorrect	36 ms	8904 KB	Output isn't correct
2	Halted	0 ms	0 KB	-

Subtask #4

0 / 10.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	348 KB	Output is correct
2	Correct	0 ms	348 KB	Output is correct
3	Correct	0 ms	348 KB	Output is correct
4	Correct	0 ms	348 KB	Output is correct
5	Correct	0 ms	348 KB	Output is correct
6	Correct	1 ms	344 KB	Output is correct
7	Correct	0 ms	348 KB	Output is correct
8	Incorrect	0 ms	348 KB	Output isn't correct
9	Halted	0 ms	0 KB	-

Subtask #5

0 / 11.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	348 KB	Output is correct
2	Correct	0 ms	348 KB	Output is correct
3	Correct	0 ms	348 KB	Output is correct
4	Correct	0 ms	348 KB	Output is correct
5	Correct	0 ms	348 KB	Output is correct
6	Correct	1 ms	344 KB	Output is correct
7	Correct	0 ms	348 KB	Output is correct
8	Incorrect	0 ms	348 KB	Output isn't correct
9	Halted	0 ms	0 KB	-

Subtask #6

0 / 20.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	348 KB	Output is correct
2	Correct	0 ms	348 KB	Output is correct
3	Correct	0 ms	348 KB	Output is correct
4	Correct	0 ms	348 KB	Output is correct
5	Correct	0 ms	348 KB	Output is correct
6	Correct	1 ms	344 KB	Output is correct
7	Correct	0 ms	348 KB	Output is correct
8	Incorrect	0 ms	348 KB	Output isn't correct
9	Halted	0 ms	0 KB	-

Subtask #7

0 / 29.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	24 ms	7112 KB	Output is correct
2	Correct	23 ms	7380 KB	Output is correct
3	Correct	32 ms	7380 KB	Output is correct
4	Correct	25 ms	7164 KB	Output is correct
5	Correct	22 ms	7376 KB	Output is correct
6	Correct	22 ms	7252 KB	Output is correct
7	Correct	30 ms	7112 KB	Output is correct
8	Correct	25 ms	7364 KB	Output is correct
9	Correct	23 ms	7108 KB	Output is correct
10	Correct	22 ms	7112 KB	Output is correct
11	Correct	15 ms	5588 KB	Output is correct
12	Correct	14 ms	5660 KB	Output is correct
13	Correct	15 ms	5588 KB	Output is correct
14	Correct	15 ms	5768 KB	Output is correct
15	Correct	24 ms	7376 KB	Output is correct
16	Correct	14 ms	5588 KB	Output is correct
17	Correct	15 ms	5588 KB	Output is correct
18	Correct	23 ms	7368 KB	Output is correct
19	Correct	22 ms	7380 KB	Output is correct
20	Correct	15 ms	5844 KB	Output is correct
21	Incorrect	36 ms	8904 KB	Output isn't correct
22	Halted	0 ms	0 KB	-