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답안 #995254

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
995254 2024-06-08T17:43:04 Z Yarema Feast (NOI19_feast) C++17
4 / 100
 343 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<db, 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];
	
	
	db l = -1, r = INF;
	FOR (i, 0, 74)
	{
		db 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 133 ms 1368 KB Output is correct
2 Correct 128 ms 1624 KB Output is correct
3 Correct 130 ms 1624 KB Output is correct
4 Correct 130 ms 1628 KB Output is correct
5 Correct 136 ms 1624 KB Output is correct
6 Correct 125 ms 1372 KB Output is correct
7 Correct 125 ms 1372 KB Output is correct
8 Correct 130 ms 1624 KB Output is correct
9 Correct 132 ms 1372 KB Output is correct
10 Correct 128 ms 1372 KB Output is correct

Subtask #2
0 / 8.0

# 결과 실행 시간 메모리 Grader output
1 Correct 129 ms 1372 KB Output is correct
2 Correct 126 ms 1624 KB Output is correct
3 Correct 133 ms 1372 KB Output is correct
4 Incorrect 127 ms 1372 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #3
0 / 18.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 343 ms 1628 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 0 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 0 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 0 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 133 ms 1368 KB Output is correct
2 Correct 128 ms 1624 KB Output is correct
3 Correct 130 ms 1624 KB Output is correct
4 Correct 130 ms 1628 KB Output is correct
5 Correct 136 ms 1624 KB Output is correct
6 Correct 125 ms 1372 KB Output is correct
7 Correct 125 ms 1372 KB Output is correct
8 Correct 130 ms 1624 KB Output is correct
9 Correct 132 ms 1372 KB Output is correct
10 Correct 128 ms 1372 KB Output is correct
11 Correct 129 ms 1372 KB Output is correct
12 Correct 126 ms 1624 KB Output is correct
13 Correct 133 ms 1372 KB Output is correct
14 Incorrect 127 ms 1372 KB Output isn't correct
15 Halted 0 ms 0 KB -