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Submission #1026011

# Submission time Handle Problem Language Result Execution time Memory
1026011 2024-07-17T12:33:07 Z fv3 Feast (NOI19_feast) C++17
12 / 100
 35 ms 7896 KB 
#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;
		else if (n < -pun)
		{
			res += last;
			if (last > 0)
				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 = 0; 
	ll r = 1e18;

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

		if (solve(c) > K)
			l = c + 1;
		else
			r = c;
	}
	ll seg_cnt = solve(l);
	cout << res + K * l << '\n';

	return 0;
}

Compilation message

feast.cpp: In function 'int main()':
feast.cpp:88:5: warning: unused variable 'seg_cnt' [-Wunused-variable]
   88 |  ll seg_cnt = solve(l);
      |     ^~~~~~~

Subtask #1
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 20 ms 5464 KB Output is correct
2 Correct 21 ms 5468 KB Output is correct
3 Correct 25 ms 5616 KB Output is correct
4 Correct 20 ms 5464 KB Output is correct
5 Correct 20 ms 5460 KB Output is correct
6 Correct 20 ms 5468 KB Output is correct
7 Correct 20 ms 5468 KB Output is correct
8 Correct 20 ms 5592 KB Output is correct
9 Correct 20 ms 5468 KB Output is correct
10 Correct 24 ms 5552 KB Output is correct

Subtask #2
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 15 ms 3676 KB Output is correct
2 Correct 13 ms 3932 KB Output is correct
3 Correct 13 ms 3632 KB Output is correct
4 Correct 13 ms 3676 KB Output is correct
5 Correct 20 ms 5468 KB Output is correct
6 Correct 13 ms 3676 KB Output is correct
7 Correct 13 ms 3824 KB Output is correct
8 Correct 20 ms 5468 KB Output is correct
9 Correct 23 ms 5468 KB Output is correct
10 Correct 13 ms 3928 KB Output is correct

Subtask #3
0 / 18.0

# Verdict Execution time Memory Grader output
1 Incorrect 35 ms 7896 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 344 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 11.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 344 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
0 / 20.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 344 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #7
0 / 29.0

# Verdict Execution time Memory Grader output
1 Correct 20 ms 5464 KB Output is correct
2 Correct 21 ms 5468 KB Output is correct
3 Correct 25 ms 5616 KB Output is correct
4 Correct 20 ms 5464 KB Output is correct
5 Correct 20 ms 5460 KB Output is correct
6 Correct 20 ms 5468 KB Output is correct
7 Correct 20 ms 5468 KB Output is correct
8 Correct 20 ms 5592 KB Output is correct
9 Correct 20 ms 5468 KB Output is correct
10 Correct 24 ms 5552 KB Output is correct
11 Correct 15 ms 3676 KB Output is correct
12 Correct 13 ms 3932 KB Output is correct
13 Correct 13 ms 3632 KB Output is correct
14 Correct 13 ms 3676 KB Output is correct
15 Correct 20 ms 5468 KB Output is correct
16 Correct 13 ms 3676 KB Output is correct
17 Correct 13 ms 3824 KB Output is correct
18 Correct 20 ms 5468 KB Output is correct
19 Correct 23 ms 5468 KB Output is correct
20 Correct 13 ms 3928 KB Output is correct
21 Incorrect 35 ms 7896 KB Output isn't correct
22 Halted 0 ms 0 KB -