Submission #1194209

#	Time	Username	Problem	Language	Result	Execution time	Memory
1194209		PlayVoltz	Knapsack (NOI18_knapsack)	C++20	100 / 100	37 ms	2884 KiB

knapsack

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

#define ll unsigned long long

int main(){
	ios_base::sync_with_stdio(0);
	cin.tie(0);
	cout.tie(0);
	ll n, k, a, b, c;
	cin>>k>>n;
	vector <pair<ll, ll> > vect[k+1];
	ll dp[k+1];
	for (int j=0; j<=k; ++j){
		dp[j] = 0;
	}
	for (int i=1; i<=n; ++i){
		cin>>a>>b>>c;
		vect[b].push_back(make_pair(a, c));
	}
	for (int i=1; i<=k; ++i){
		sort(vect[i].begin(), vect[i].end(), greater<pair<ll, ll> >());
		int index = 0;
		for (int j=0; j<k/i; ++j){
			if (index>=vect[i].size())break;
			for (int l=k; l>=i; --l){
				dp[l] = max(dp[l], dp[l-i]+vect[i][index].first);
			}
			--vect[i][index].second;
			if (vect[i][index].second==0)++index;
		}
	}
	cout<<dp[k];
}

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