Submission #484680

#	Time	Username	Problem	Language	Result	Execution time	Memory
484680		Ncode	Knapsack (NOI18_knapsack)	C++14	0 / 100	261 ms	259716 KiB

knapsack

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

int dp[20005][20005];

const int inf = 1e9+5; 

int main(){
	int S, n;
	cin>>S>>n;
	int v, w, k;
	vector<pair<int, int>> a;
	for(int i=0;i<n;i++){
		cin>>v>>w>>k;
		while(k--) a.push_back({v, w});
	}
	// for(int i=0;i<n;i++){
	// 	for(int j=0;j<=S;j++){
	// 		dp[i][j] = inf;
	// 	}
	// }
	dp[0][0] = 0;
	for(int i=0;i<a.size();i++){
		for(int sum = S; sum >= 0; sum --){
			dp[i][sum] = dp[i-1][sum];
			if(sum >= a[i].second && dp[i-1][sum - a[i].second] + a[i].first > dp[i][sum]){
				dp[i][sum] = dp[i-1][sum - a[i].second] + a[i].first;
			}
		}
	}
	// for(int i=0;i<n;i++){
	// 	for(int j = 0; j<=S; j++){
	// 		cout<<dp[i][j]<<" ";
	// 	}cout<<endl;
	// }
	cout<<dp[a.size() - 1][S]<<'\n';
}

Compilation message (stderr)

knapsack.cpp: In function 'int main()':
knapsack.cpp:23:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   23 |  for(int i=0;i<a.size();i++){
      |              ~^~~~~~~~~

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