Submission #850466

#	Time	Username	Problem	Language	Result	Execution time	Memory
850466		alexz1205	Knapsack (NOI18_knapsack)	C++14	73 / 100	1034 ms	600 KiB

knapsack

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

const int S = 2000, N = 1e5;

int arr[S+1];

int main() {
	int s, n;
	cin >> s >> n;
	multiset<int> weights[s+1];
	for (int x = 0; x < n; x ++){
		int v, w, k;
		cin >> v >> w >> k;
		k = min(k, s/w);
		for (int x = 0; x < k; x ++){
			weights[w].insert(v);
			if (weights[w].size() > (s/w)){
				weights[w].erase(weights[w].begin());
			}
		}
	}
	for (int x = 1; x <= s; x ++){
		for (int v: weights[x]){
//			cout << v << " ";
			for (int i = s-x; i >= 0; i --){
				arr[i+x] = max(arr[i+x], arr[i]+v);
			}
			for (int i = 1; i <= s; i ++){
				arr[i] = max(arr[i], arr[i-1]);
			}
		}
//		cout << endl;
	}
	cout << arr[s] << endl;
	return 0;
}

Compilation message (stderr)

knapsack.cpp: In function 'int main()':
knapsack.cpp:18:26: warning: comparison of integer expressions of different signedness: 'std::multiset<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   18 |    if (weights[w].size() > (s/w)){
      |        ~~~~~~~~~~~~~~~~~~^~~~~~~

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