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Submission #967243

# Submission time Handle Problem Language Result Execution time Memory
967243 2024-04-21T15:19:44 Z SmuggingSpun Knapsack (NOI18_knapsack) C++14
100 / 100
 44 ms 4180 KB 
#include<bits/stdc++.h>
#define taskname "knapsack"
using namespace std;
template<class T>void maximize(T& a, T b){
	if(a < b){
		a = b;
	}
}
const int lim = 2e3 + 1;
int cnt[lim], dp[lim];
vector<int>a[lim];
int main(){
	ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
	if(fopen(taskname".inp", "r")){
		freopen(taskname".inp", "r", stdin);
	}
	memset(cnt, 0, sizeof(cnt));
	int S, n;
	cin >> S >> n;
	vector<int>v(n), w(n), k(n);
	for(int i = 0; i < n; i++){
		cin >> v[i] >> w[i] >> k[i]; 
	}
	vector<int>p(n);
	iota(p.begin(), p.end(), 0);
	sort(p.begin(), p.end(), [&] (int i, int j) -> bool{
		return v[i] > v[j];
	});
	for(int& i : p){
		int max_size = S / w[i];
		while(a[w[i]].size() < max_size && k[i] > 0){
			a[w[i]].emplace_back(v[i]);
			k[i]--;
		}
	}
	memset(dp, 0, sizeof(dp));
	for(int i = 1; i <= S; i++){
		for(int j = S; j >= i; j--){
			for(int k = 0, value = 0; k < a[i].size() && i * (k + 1) <= j; k++){
				maximize(dp[j], dp[j - i * (k + 1)] + (value += a[i][k]));
			}
		}
	}
	cout << dp[S];
}

Compilation message

knapsack.cpp: In function 'int main()':
knapsack.cpp:31:24: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   31 |   while(a[w[i]].size() < max_size && k[i] > 0){
      |         ~~~~~~~~~~~~~~~^~~~~~~~~~
knapsack.cpp:39:32: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   39 |    for(int k = 0, value = 0; k < a[i].size() && i * (k + 1) <= j; k++){
      |                              ~~^~~~~~~~~~~~~
knapsack.cpp:15:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   15 |   freopen(taskname".inp", "r", stdin);
      |   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct

Subtask #2
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 2 ms 348 KB Output is correct
3 Correct 2 ms 348 KB Output is correct
4 Correct 2 ms 348 KB Output is correct
5 Correct 2 ms 348 KB Output is correct
6 Correct 2 ms 348 KB Output is correct
7 Correct 2 ms 344 KB Output is correct
8 Correct 3 ms 500 KB Output is correct
9 Correct 2 ms 348 KB Output is correct
10 Correct 2 ms 348 KB Output is correct

Subtask #3
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 2 ms 348 KB Output is correct
3 Correct 2 ms 348 KB Output is correct
4 Correct 2 ms 348 KB Output is correct
5 Correct 2 ms 348 KB Output is correct
6 Correct 2 ms 348 KB Output is correct
7 Correct 2 ms 344 KB Output is correct
8 Correct 3 ms 500 KB Output is correct
9 Correct 2 ms 348 KB Output is correct
10 Correct 2 ms 348 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 3 ms 348 KB Output is correct
13 Correct 2 ms 348 KB Output is correct
14 Correct 2 ms 348 KB Output is correct
15 Correct 2 ms 344 KB Output is correct
16 Correct 2 ms 448 KB Output is correct
17 Correct 2 ms 348 KB Output is correct
18 Correct 2 ms 348 KB Output is correct
19 Correct 2 ms 348 KB Output is correct
20 Correct 2 ms 516 KB Output is correct

Subtask #4
24.0 / 24.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 2 ms 348 KB Output is correct
7 Correct 2 ms 348 KB Output is correct
8 Correct 2 ms 348 KB Output is correct
9 Correct 2 ms 348 KB Output is correct
10 Correct 2 ms 348 KB Output is correct
11 Correct 2 ms 344 KB Output is correct
12 Correct 3 ms 500 KB Output is correct
13 Correct 2 ms 348 KB Output is correct
14 Correct 2 ms 348 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 3 ms 348 KB Output is correct
17 Correct 2 ms 348 KB Output is correct
18 Correct 2 ms 348 KB Output is correct
19 Correct 2 ms 344 KB Output is correct
20 Correct 2 ms 448 KB Output is correct
21 Correct 2 ms 348 KB Output is correct
22 Correct 2 ms 348 KB Output is correct
23 Correct 2 ms 348 KB Output is correct
24 Correct 2 ms 516 KB Output is correct
25 Correct 0 ms 348 KB Output is correct
26 Correct 4 ms 348 KB Output is correct
27 Correct 2 ms 348 KB Output is correct
28 Correct 2 ms 600 KB Output is correct
29 Correct 2 ms 348 KB Output is correct
30 Correct 2 ms 536 KB Output is correct
31 Correct 2 ms 348 KB Output is correct
32 Correct 2 ms 348 KB Output is correct
33 Correct 2 ms 524 KB Output is correct
34 Correct 2 ms 348 KB Output is correct

Subtask #5
27.0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 2 ms 348 KB Output is correct
7 Correct 2 ms 348 KB Output is correct
8 Correct 2 ms 348 KB Output is correct
9 Correct 2 ms 348 KB Output is correct
10 Correct 2 ms 348 KB Output is correct
11 Correct 2 ms 344 KB Output is correct
12 Correct 3 ms 500 KB Output is correct
13 Correct 2 ms 348 KB Output is correct
14 Correct 2 ms 348 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 3 ms 348 KB Output is correct
17 Correct 2 ms 348 KB Output is correct
18 Correct 2 ms 348 KB Output is correct
19 Correct 2 ms 344 KB Output is correct
20 Correct 2 ms 448 KB Output is correct
21 Correct 2 ms 348 KB Output is correct
22 Correct 2 ms 348 KB Output is correct
23 Correct 2 ms 348 KB Output is correct
24 Correct 2 ms 516 KB Output is correct
25 Correct 0 ms 348 KB Output is correct
26 Correct 4 ms 348 KB Output is correct
27 Correct 2 ms 348 KB Output is correct
28 Correct 2 ms 600 KB Output is correct
29 Correct 2 ms 348 KB Output is correct
30 Correct 2 ms 536 KB Output is correct
31 Correct 2 ms 348 KB Output is correct
32 Correct 2 ms 348 KB Output is correct
33 Correct 2 ms 524 KB Output is correct
34 Correct 2 ms 348 KB Output is correct
35 Correct 23 ms 3024 KB Output is correct
36 Correct 28 ms 3164 KB Output is correct
37 Correct 25 ms 3136 KB Output is correct
38 Correct 25 ms 3460 KB Output is correct
39 Correct 29 ms 4176 KB Output is correct
40 Correct 44 ms 4180 KB Output is correct
41 Correct 36 ms 3416 KB Output is correct
42 Correct 37 ms 3420 KB Output is correct
43 Correct 41 ms 3536 KB Output is correct
44 Correct 40 ms 3408 KB Output is correct
45 Correct 30 ms 3932 KB Output is correct
46 Correct 28 ms 4180 KB Output is correct
47 Correct 32 ms 4172 KB Output is correct
48 Correct 35 ms 3992 KB Output is correct
49 Correct 21 ms 3676 KB Output is correct
50 Correct 37 ms 4052 KB Output is correct