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답안 #995253

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
995253 2024-06-08T17:42:30 Z Yarema Feast (NOI19_feast) C++17
12 / 100
 129 ms 1628 KB 
#include <bits/stdc++.h>

using namespace std;

#define FOR(i, a, b) for(int i = (a); i < (b); i++)
#define RFOR(i, a, b) for(int i = (a) - 1; i >= (b); i--)
#define SZ(a) int(a.size())
#define ALL(a) a.begin(), a.end()
#define PB push_back
#define MP make_pair
#define F first
#define S second

typedef long long LL;
typedef vector<int> VI;
typedef pair<int, int> PII;
typedef long double db;
typedef pair<LL, int> PLI;

const int INF = 1e9 + 47;

PLI f(VI& a, db lambda)
{
	int n = SZ(a);
	PLI dp0 = {0, 0};
	PLI dp1 = {-47ll * INF, 0};
	FOR (i, 0, n)
	{
		PLI ndp0 = max(dp0, dp1);
		PLI ndp1 = max(PLI(dp0.F + a[i] - lambda, dp0.S + 1), PLI(dp1.F + a[i], dp1.S));
		
		dp0 = ndp0;
		dp1 = ndp1;
		//cerr << i << ' ' << dp0.F << ' ' << dp0.S << ' ' << dp1.F << ' ' << dp1.S << '\n';
	}
	return max(dp0, dp1);
}

int main()
{
	ios::sync_with_stdio(0);
	cin.tie(0);
	
	int n, k;
	cin >> n >> k;
	VI a(n);
	FOR (i, 0, n)
		cin >> a[i];
	
	
	LL l = -1, r = INF;
	while (l + 1 < r)
	{
		LL m = (l + r) / 2;
		auto [val, cnt] = f(a, m);
		if (cnt > k)
			l = m;
		else
			r = m;
	}
	//cerr << r << '\n';
	auto [val, cnt] = f(a, r);
	cout << LL(val + cnt * r) << '\n';
	
	return 0;
}

Subtask #1
4.0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Correct 86 ms 1372 KB Output is correct
2 Correct 93 ms 1628 KB Output is correct
3 Correct 94 ms 1628 KB Output is correct
4 Correct 94 ms 1628 KB Output is correct
5 Correct 87 ms 1372 KB Output is correct
6 Correct 94 ms 1372 KB Output is correct
7 Correct 91 ms 1372 KB Output is correct
8 Correct 90 ms 1628 KB Output is correct
9 Correct 92 ms 1372 KB Output is correct
10 Correct 96 ms 1372 KB Output is correct

Subtask #2
8.0 / 8.0

# 결과 실행 시간 메모리 Grader output
1 Correct 84 ms 1372 KB Output is correct
2 Correct 98 ms 1628 KB Output is correct
3 Correct 76 ms 1372 KB Output is correct
4 Correct 83 ms 1372 KB Output is correct
5 Correct 102 ms 1372 KB Output is correct
6 Correct 84 ms 1372 KB Output is correct
7 Correct 83 ms 1628 KB Output is correct
8 Correct 93 ms 1384 KB Output is correct
9 Correct 88 ms 1368 KB Output is correct
10 Correct 88 ms 1628 KB Output is correct

Subtask #3
0 / 18.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 129 ms 1624 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 1 ms 344 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 11.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 1 ms 344 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 1 ms 344 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #7
0 / 29.0

# 결과 실행 시간 메모리 Grader output
1 Correct 86 ms 1372 KB Output is correct
2 Correct 93 ms 1628 KB Output is correct
3 Correct 94 ms 1628 KB Output is correct
4 Correct 94 ms 1628 KB Output is correct
5 Correct 87 ms 1372 KB Output is correct
6 Correct 94 ms 1372 KB Output is correct
7 Correct 91 ms 1372 KB Output is correct
8 Correct 90 ms 1628 KB Output is correct
9 Correct 92 ms 1372 KB Output is correct
10 Correct 96 ms 1372 KB Output is correct
11 Correct 84 ms 1372 KB Output is correct
12 Correct 98 ms 1628 KB Output is correct
13 Correct 76 ms 1372 KB Output is correct
14 Correct 83 ms 1372 KB Output is correct
15 Correct 102 ms 1372 KB Output is correct
16 Correct 84 ms 1372 KB Output is correct
17 Correct 83 ms 1628 KB Output is correct
18 Correct 93 ms 1384 KB Output is correct
19 Correct 88 ms 1368 KB Output is correct
20 Correct 88 ms 1628 KB Output is correct
21 Incorrect 129 ms 1624 KB Output isn't correct
22 Halted 0 ms 0 KB -