Submission #1026022

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
1026022	2024-07-17T12:41:55 Z	fv3	Feast (NOI19_feast)	C++14	12 / 100	32 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;

		//cerr << last << ' ' << res << '\n';
	}

	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);
	}

	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	5456 KB	Output is correct
2	Correct	21 ms	5468 KB	Output is correct
3	Correct	20 ms	5468 KB	Output is correct
4	Correct	20 ms	5468 KB	Output is correct
5	Correct	21 ms	5464 KB	Output is correct
6	Correct	26 ms	5288 KB	Output is correct
7	Correct	20 ms	5464 KB	Output is correct
8	Correct	21 ms	5468 KB	Output is correct
9	Correct	20 ms	5460 KB	Output is correct
10	Correct	20 ms	5576 KB	Output is correct

Subtask #2

8.0 / 8.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	16 ms	3676 KB	Output is correct
2	Correct	13 ms	3928 KB	Output is correct
3	Correct	13 ms	3676 KB	Output is correct
4	Correct	14 ms	3676 KB	Output is correct
5	Correct	22 ms	5468 KB	Output is correct
6	Correct	13 ms	3676 KB	Output is correct
7	Correct	13 ms	3932 KB	Output is correct
8	Correct	21 ms	5468 KB	Output is correct
9	Correct	27 ms	5404 KB	Output is correct
10	Correct	14 ms	3676 KB	Output is correct

Subtask #3

0 / 18.0

#	Verdict	Execution time	Memory	Grader output
1	Incorrect	32 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	348 KB	Output is correct
5	Incorrect	0 ms	348 KB	Output isn't correct
6	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	Incorrect	0 ms	348 KB	Output isn't correct
6	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	Incorrect	0 ms	348 KB	Output isn't correct
6	Halted	0 ms	0 KB	-

Subtask #7

0 / 29.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	20 ms	5456 KB	Output is correct
2	Correct	21 ms	5468 KB	Output is correct
3	Correct	20 ms	5468 KB	Output is correct
4	Correct	20 ms	5468 KB	Output is correct
5	Correct	21 ms	5464 KB	Output is correct
6	Correct	26 ms	5288 KB	Output is correct
7	Correct	20 ms	5464 KB	Output is correct
8	Correct	21 ms	5468 KB	Output is correct
9	Correct	20 ms	5460 KB	Output is correct
10	Correct	20 ms	5576 KB	Output is correct
11	Correct	16 ms	3676 KB	Output is correct
12	Correct	13 ms	3928 KB	Output is correct
13	Correct	13 ms	3676 KB	Output is correct
14	Correct	14 ms	3676 KB	Output is correct
15	Correct	22 ms	5468 KB	Output is correct
16	Correct	13 ms	3676 KB	Output is correct
17	Correct	13 ms	3932 KB	Output is correct
18	Correct	21 ms	5468 KB	Output is correct
19	Correct	27 ms	5404 KB	Output is correct
20	Correct	14 ms	3676 KB	Output is correct
21	Incorrect	32 ms	7888 KB	Output isn't correct
22	Halted	0 ms	0 KB	-