Submission #972651

#	Time	Username	Problem	Language	Result	Execution time	Memory
972651		raspy	Knapsack (NOI18_knapsack)	C++14	100 / 100	93 ms	4944 KiB

knapsack

#include <iostream>
#include <queue>
#include <vector>
#include <cstring>

#define int long long
#define inf 1'000'000'000'000

using namespace std;
typedef priority_queue<pair<long long, long long>> prq;

priority_queue<pair<int, int>> vpq[2001];
int dp[2005];

int32_t main()
{
	int s, n;
	cin >> s >> n;
	for (int i = 0; i < n; i++)
	{
		int v, w, k;
		cin >> v >> w >> k;
		vpq[w].push({v, k});
	}
	// floyd-warshall
	for (int i = 1; i <= s; i++)
	{
		int mx = s/i;
		while (!vpq[i].empty() && mx)
		{
			pair<int, int> pr = vpq[i].top();
			vpq[i].pop();
			pr.second = min(pr.second, mx);
			for (int j = 0; j < pr.second; j++)
				for (int z = s; z >= i; z--)
					dp[z] = max(dp[z], dp[z-i] + pr.first);
			mx -= pr.second;
		}
	}
	int rez = 0;
	for (int i = 0; i <= s; i++)
		rez = max(rez, dp[i]);
	cout << rez << "\n";
	return 0;
}

• Subtask 1: 12 / 12
• Subtask 2: 17 / 17
• Subtask 3: 20 / 20
• Subtask 4: 24 / 24
• Subtask 5: 27 / 27