Submission #1201912

#	Time	Username	Problem	Language	Result	Execution time	Memory
1201912		prideliqueee	Knapsack (NOI18_knapsack)	C++20	100 / 100	40 ms	1864 KiB

knapsack

#include<bits/stdc++.h>
using namespace std;

#define f first
#define s second
int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    int s,n;
    cin>>s>>n;
    priority_queue<pair<int,int>> pq[s+1];
    for(int i=0;i<n;i++)
    {
        int v,w,s;
        cin>>v>>w>>s;
        pq[w].push({v,s});
    }
    vector<pair<int,int>> a;
    for(int i=1;i<=s;i++)
    {
        int cnt=(s+i-1)/i;
        while(!pq[i].empty()&&cnt)
        {
            int v=pq[i].top().f,s=pq[i].top().s;
            pq[i].pop();
            int temp=s;
            while(cnt>=0&&temp>0)
            {
                a.push_back({v,i});
                temp--;
                cnt--;
            }
        }
    }
    int dp[s+1];
    memset(dp,0,sizeof dp);
    int ans=0;
    for(auto x:a)
    {
        int v=x.f,w=x.s;
        for(int i=s;i>=w;i--)
        {
            dp[i]=max(dp[i],dp[i-w]+v);
            ans=max(ans,dp[i]);
        }
    }
    cout<<ans;
}

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