Submission #1026031

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
1026031	2024-07-17T13:00:59 Z	fv3	Feast (NOI19_feast)	C++14	12 / 100	33 ms	7888 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;

	a = vector<ll>(N);

	for (int i = 0; i < N; i++)
		cin >> a[i];

	{
		ll sum = a[0];
		for (int i = 1; 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.back() <= 0) 
		b.pop_back();

	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	20 ms	5296 KB	Output is correct
2	Correct	20 ms	5464 KB	Output is correct
3	Correct	21 ms	5468 KB	Output is correct
4	Correct	21 ms	5468 KB	Output is correct
5	Correct	22 ms	5556 KB	Output is correct
6	Correct	20 ms	5424 KB	Output is correct
7	Correct	26 ms	5336 KB	Output is correct
8	Correct	21 ms	5468 KB	Output is correct
9	Correct	21 ms	5524 KB	Output is correct
10	Correct	22 ms	5448 KB	Output is correct

Subtask #2

8.0 / 8.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	12 ms	3676 KB	Output is correct
2	Correct	14 ms	3932 KB	Output is correct
3	Correct	18 ms	3636 KB	Output is correct
4	Correct	18 ms	3672 KB	Output is correct
5	Correct	20 ms	5420 KB	Output is correct
6	Correct	20 ms	3764 KB	Output is correct
7	Correct	13 ms	3932 KB	Output is correct
8	Correct	21 ms	5468 KB	Output is correct
9	Correct	28 ms	5468 KB	Output is correct
10	Correct	13 ms	3804 KB	Output is correct

Subtask #3

0 / 18.0

#	Verdict	Execution time	Memory	Grader output
1	Incorrect	33 ms	7888 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	604 KB	Output is correct
5	Correct	0 ms	348 KB	Output is correct
6	Correct	0 ms	348 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	604 KB	Output is correct
5	Correct	0 ms	348 KB	Output is correct
6	Correct	0 ms	348 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	604 KB	Output is correct
5	Correct	0 ms	348 KB	Output is correct
6	Correct	0 ms	348 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	20 ms	5296 KB	Output is correct
2	Correct	20 ms	5464 KB	Output is correct
3	Correct	21 ms	5468 KB	Output is correct
4	Correct	21 ms	5468 KB	Output is correct
5	Correct	22 ms	5556 KB	Output is correct
6	Correct	20 ms	5424 KB	Output is correct
7	Correct	26 ms	5336 KB	Output is correct
8	Correct	21 ms	5468 KB	Output is correct
9	Correct	21 ms	5524 KB	Output is correct
10	Correct	22 ms	5448 KB	Output is correct
11	Correct	12 ms	3676 KB	Output is correct
12	Correct	14 ms	3932 KB	Output is correct
13	Correct	18 ms	3636 KB	Output is correct
14	Correct	18 ms	3672 KB	Output is correct
15	Correct	20 ms	5420 KB	Output is correct
16	Correct	20 ms	3764 KB	Output is correct
17	Correct	13 ms	3932 KB	Output is correct
18	Correct	21 ms	5468 KB	Output is correct
19	Correct	28 ms	5468 KB	Output is correct
20	Correct	13 ms	3804 KB	Output is correct
21	Incorrect	33 ms	7888 KB	Output isn't correct
22	Halted	0 ms	0 KB	-