Submission #561535

#	Time	Username	Problem	Language	Result	Execution time	Memory
561535		OnionEgg	Knapsack (NOI18_knapsack)	C++17	73 / 100	13 ms	5176 KiB

knapsack

#pragma GCC optimize("O3")
#include<bits/stdc++.h>
#define ll long long
#define nmax 505
#define fas ios::sync_with_stdio(0); cout.tie(0); cin.tie(0)
#define el "\n"
#define fi first
#define se second
using namespace std;
ll n, W, v[50005], w[50005], a[50005], dp[100005], dem;
int main()
{
fas;
	memset(dp,0, sizeof(dp));
	dp[0]=0;
	cin >> W >> n;
	for(int i = 1;i <= n;i++) cin >> v[i] >> w[i] >> a[i];
	for(int i = n;i >= 1; i--)
    {
		while(a[i] > 1)
		{
			int dem = 1;
			while (a[i] > dem)
			{
				a[i] -= dem;
				n++;
				v[n] = v[i]*dem;
				w[n] = w[i]*dem;
				dem*=2;
			}
		}
	}
	for(int i = 1; i <= n; i++)
    {
        for(int j = W; j >= w[i]; j--) dp[j] = max(dp[j], dp[j-w[i]]+v[i]);
    }
	cout << dp[W];
}

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