Submission #989561

#	Time	Username	Problem	Language	Result	Execution time	Memory
989561		matus192	Knapsack (NOI18_knapsack)	C++14	12 / 100	4 ms	480 KiB

knapsack

#include <bits/stdc++.h>

using namespace std;
typedef long long ll;

#define int ll

signed main() {
    int s, n;
    cin >> s >> n;
    vector<vector<pair<int, int>>> items(s+1);
    for (int i = 0; i < n; i++) {
        int val, w, amount;
        cin >> val >> w >> amount;
        items[w].push_back({val, amount});
    }
    for (auto vec : items) {
        sort(vec.begin(), vec.end(), greater<pair<int, int>>());
    }
    vector<int> prv(s + 1, 0), akt(s + 1, 0);
    for (int item = 1; item < items.size(); item++) {
        for (int weight = 0; weight <= s; weight++) {
            int val = 0, w = 0, num = 0, amo = 1;

            while (amo -1 <= s / item) {
                if (items[item].size() <= num) break;
                if (amo > items[item][num].second) {
                    amo = 1;
                    num++;
                    if (items[item].size() <= num) continue;
                }

                val += items[item][num].first;
                w += item;
                amo++;

                if (weight < w) break;
                akt[weight] = max(akt[weight], val + prv[weight - w]);
            }
        }
		prv = akt;
    }
    cout << akt[s] << '\n';

    return 0;
}

Compilation message (stderr)

knapsack.cpp: In function 'int main()':
knapsack.cpp:21:29: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'std::vector<std::vector<std::pair<long long int, long long int> > >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   21 |     for (int item = 1; item < items.size(); item++) {
      |                        ~~~~~^~~~~~~~~~~~~~
knapsack.cpp:26:40: warning: comparison of integer expressions of different signedness: 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} and 'll' {aka 'long long int'} [-Wsign-compare]
   26 |                 if (items[item].size() <= num) break;
      |                     ~~~~~~~~~~~~~~~~~~~^~~~~~
knapsack.cpp:30:44: warning: comparison of integer expressions of different signedness: 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} and 'll' {aka 'long long int'} [-Wsign-compare]
   30 |                     if (items[item].size() <= num) continue;
      |                         ~~~~~~~~~~~~~~~~~~~^~~~~~

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