Submission #501361

#	Time	Username	Problem	Language	Result	Execution time	Memory
501361		ala2	Knapsack (NOI18_knapsack)	C++14	49 / 100	1092 ms	6076 KiB

knapsack

/*
ID: alaa523
LANG: C++11
PROB: Fruit Feast
*/
#include <bits/stdc++.h>

#define pb push_back
#define int long long
#define F first
#define S second
using namespace std;
int n,s;
int v[1001000];
int w[1001000];
int k[1000100];
vector<pair<int,int>>a;
int dp[200001];
int dp2[200011];
signed main()
{
    memset(dp,-1,sizeof dp);
    cin>>s>>n;
    for(int i=0; i<n; i++)
    {
        cin>>v[i]>>w[i]>>k[i];
        k[i]=min(k[i],s);
    }
    for(int i=0; i<n; i++)
    {
        for(int j=0; j<k[i]; j++)
        {
            a.pb({v[i],w[i]});
        }
    }
    dp[0]=0;
    int mx=0;


    for(int j=0; j<a.size(); j++)
    {
        for(int i=0;i<=s;i++)
        {
            if(dp[i]!=-1)
            {
                if(a[j].S+i>s)
                    continue;
                dp2[a[j].S+i]=max(dp[a[j].S+i],dp[i]+a[j].F);

            }
        }
        for(int i=0;i<=s;i++)
            dp[i]=max(dp[i],dp2[i]);

    }
    for(int i=1; i<=s; i++)
        {
           // cout<<"   "<<i<<"  "<<dp[i]<<endl;
            mx=max(mx,dp[i]);
        }

    cout<<mx<<endl;


}
//dp[i]=the maxvalue we can reach with  i weight
//dp[i]=max(dp[i],dp[i-w[j]]+v[j]);

Compilation message (stderr)

knapsack.cpp: In function 'int main()':
knapsack.cpp:40:19: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   40 |     for(int j=0; j<a.size(); j++)
      |                  ~^~~~~~~~~

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