Submission #1218182

#	Time	Username	Problem	Language	Result	Execution time	Memory
1218182		shuvo_06	Knapsack (NOI18_knapsack)	C++20	73 / 100	1096 ms	464 KiB

knapsack

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

int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);

    int S, N;
    cin >> S >> N;

    vector<int> dp(S + 1, 0);

    for (int i = 0; i < N; i++) {
        int val, wt, cnt;
        cin >> val >> wt >> cnt;
        if (wt > S) continue;

        for (int r = 0; r < wt; r++) {
            deque<pair<int,int>> dq;
            for (int j = 0, pos = r; pos <= S; j++, pos += wt) {
                int cur = dp[pos] - j * val;
                while (!dq.empty() && dq.back().first <= cur) dq.pop_back();
                dq.emplace_back(cur, j);
                while (dq.front().second < j - cnt) dq.pop_front();
                dp[pos] = dq.front().first + j * val;
            }
        }
    }

    cout << *max_element(dp.begin(), dp.end()) << "\n";

    return 0;
}

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