Submission #1082949

#	Time	Username	Problem	Language	Result	Execution time	Memory
1082949		Kiet07	Knapsack (NOI18_knapsack)	C++14	100 / 100	72 ms	35152 KiB

knapsack

#include<bits/stdc++.h>
using namespace std;
int main()
{
	ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
	//freopen("TEST.inp","r",stdin);
	map<int,vector<pair<int,int>>>mp;
	int limit,n; cin>>limit>>n;
	for(int i=1;i<=n;i++)
	{
		int v,w,k; cin>>v>>w>>k;
		mp[w].push_back({v,k});
	}
	vector<vector<long long>>dp(mp.size()+1,vector<long long>(limit+1,0));
	int i=1;
	for(auto it:mp)
	{
		sort(it.second.begin(),it.second.end(),greater<pair<int,int>>());
		for(int j=1;j<=limit;j++)
		{
			dp[i][j]=dp[i-1][j];
			long long profit=0;
			int cur_i=0,cnt=0,copy=0;
			while((copy+1)*it.first<=j&&cur_i<it.second.size())
			{
				copy++;
				profit+=it.second[cur_i].first;
				cnt++;
				dp[i][j]=max(dp[i][j],dp[i-1][j-copy*it.first]+profit);
				if(cnt==it.second[cur_i].second)
				{
					cur_i++;
					cnt=0;
				}
			}
		}
		i++;
	}
	cout<<dp[mp.size()][limit];
	return 0;
}

Compilation message (stderr)

knapsack.cpp: In function 'int main()':
knapsack.cpp:24:37: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   24 |    while((copy+1)*it.first<=j&&cur_i<it.second.size())
      |                                ~~~~~^~~~~~~~~~~~~~~~~

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