Submission #1016884

#	Time	Username	Problem	Language	Result	Execution time	Memory
1016884		thinknoexit	Knapsack (NOI18_knapsack)	C++17	100 / 100	42 ms	2908 KiB

knapsack

#include <bits/stdc++.h>
using namespace std;
using ll = long long;
int v[100100], w[100100], k[100100];
int dp[2020];
vector<pair<int, int>> vec[2020];
int main() {
    cin.tie(nullptr)->sync_with_stdio(false);
    int s, n;
    cin >> s >> n;
    for (int i = 1;i <= n;i++) {
        cin >> v[i] >> w[i] >> k[i];
        k[i] = min(k[i], s / w[i]);
        vec[w[i]].push_back({ v[i], k[i] });
    }
    for (int i = 1;i <= s;i++) {
        sort(vec[i].rbegin(), vec[i].rend());
        int cnt = s / i;
        int now = 0;
        for (auto& x : vec[i]) {
            while (x.second-- && ++now <= cnt) {
                for (int j = 2000;j >= i;j--) {
                    dp[j] = max(dp[j], dp[j - i] + x.first);
                }
            }
            if (now > cnt) break;
        }
    }
    cout << (*max_element(dp, dp + s + 1));
    return 0;
}

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