oj.uz

답안 #995251

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
995251 2024-06-08T17:41:16 Z Yarema Feast (NOI19_feast) C++17
12 / 100
 156 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 = {-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;
	while (l + 1 < r)
	{
		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 67 ms 1368 KB Output is correct
2 Correct 65 ms 1628 KB Output is correct
3 Correct 66 ms 1628 KB Output is correct
4 Correct 68 ms 1628 KB Output is correct
5 Correct 64 ms 1368 KB Output is correct
6 Correct 63 ms 1372 KB Output is correct
7 Correct 63 ms 1368 KB Output is correct
8 Correct 67 ms 1372 KB Output is correct
9 Correct 63 ms 1372 KB Output is correct
10 Correct 64 ms 1372 KB Output is correct

Subtask #2
8.0 / 8.0

# 결과 실행 시간 메모리 Grader output
1 Correct 59 ms 1372 KB Output is correct
2 Correct 61 ms 1624 KB Output is correct
3 Correct 57 ms 1372 KB Output is correct
4 Correct 59 ms 1368 KB Output is correct
5 Correct 65 ms 1368 KB Output is correct
6 Correct 58 ms 1368 KB Output is correct
7 Correct 60 ms 1624 KB Output is correct
8 Correct 67 ms 1628 KB Output is correct
9 Correct 62 ms 1372 KB Output is correct
10 Correct 61 ms 1624 KB Output is correct

Subtask #3
0 / 18.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 156 ms 1372 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 348 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 348 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 348 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #7
0 / 29.0

# 결과 실행 시간 메모리 Grader output
1 Correct 67 ms 1368 KB Output is correct
2 Correct 65 ms 1628 KB Output is correct
3 Correct 66 ms 1628 KB Output is correct
4 Correct 68 ms 1628 KB Output is correct
5 Correct 64 ms 1368 KB Output is correct
6 Correct 63 ms 1372 KB Output is correct
7 Correct 63 ms 1368 KB Output is correct
8 Correct 67 ms 1372 KB Output is correct
9 Correct 63 ms 1372 KB Output is correct
10 Correct 64 ms 1372 KB Output is correct
11 Correct 59 ms 1372 KB Output is correct
12 Correct 61 ms 1624 KB Output is correct
13 Correct 57 ms 1372 KB Output is correct
14 Correct 59 ms 1368 KB Output is correct
15 Correct 65 ms 1368 KB Output is correct
16 Correct 58 ms 1368 KB Output is correct
17 Correct 60 ms 1624 KB Output is correct
18 Correct 67 ms 1628 KB Output is correct
19 Correct 62 ms 1372 KB Output is correct
20 Correct 61 ms 1624 KB Output is correct
21 Incorrect 156 ms 1372 KB Output isn't correct
22 Halted 0 ms 0 KB -