Submission #862290

#	Time	Username	Problem	Language	Result	Execution time	Memory
862290		eric_ge	Knapsack (NOI18_knapsack)	C++14	73 / 100	1088 ms	4080 KiB

knapsack

#include <bits/stdc++.h>
using namespace std;
using ll = long long int;
using ld = long double;

#define F0R(i, a, b) for (int i = (a); i < (b); i++)
#define FOR(i, a) F0R(i, 0, a)

#define f first
#define s second

ll cx[] = {0, 1, 0, -1};
ll cy[] = {1, 0, -1, 0};

const ll INF = 1e9 + 7;

struct item
{
	ll p;
	ll w;
	ll amount;
};

// auto start = chrono::steady_clock::now();


int main() 
{
	ios::sync_with_stdio(false);
	cin.tie(nullptr);

	ll t, n;

	cin >> t >> n;

	vector<item> v(n+1);
	
	for (ll i = 1; i <= n; i++) cin >> v[i].p >> v[i].w >> v[i].amount;

	vector<ll> dp(t+1, 0);
	ll ans = 0;
	for (ll i = 1; i <= n; i++)
	{
		ll times = min(v[i].amount, (t / v[i].w));
		for (ll j = 0; j < times; j++)
		{
			for (ll k = t; k >= 0; k--)
			{
				if (dp[k] > 0 && k + v[i].w <= t) 
				{
					dp[k + v[i].w] = max(dp[k + v[i].w], dp[k] + v[i].p);
					ans = max(ans, dp[k + v[i].w]);
				}
				if (k == v[i].w)
				{
					dp[k] = max(dp[k], v[i].p);
					ans = max(ans, dp[k]);
				}
			}
		}
	}

	cout << ans;


	// cout << "\n";
	// auto end = chrono::steady_clock::now();
	// auto diff = end - start;
	// cout << chrono::duration<double, milli>(diff).count() << " ms" << endl;

	return 0;
}

• Subtask 1: 12 / 12
• Subtask 2: 17 / 17
• Subtask 3: 20 / 20
• Subtask 4: 24 / 24
• Subtask 5: 0 / 27