Submission #1358689

#	Time	Username	Problem	Language	Result	Execution time	Memory
1358689		Desh03	Knapsack (NOI18_knapsack)	C++20	100 / 100	25 ms	1852 KiB

knapsack

#include <bits/stdc++.h>

using namespace std;

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    int s, n;
    cin >> s >> n;
    vector<vector<pair<int, int>>> br(s + 1);
    for (int i = 0; i < n; i++) {
        int r, v, k;
        cin >> r >> v >> k;
        br[v].push_back({r, k});
    }
    vector<pair<int, int>> cc;
    for (int i = 1; i <= s; i++) {
        sort(br[i].rbegin(), br[i].rend());
        int k = s / i;
        for (auto [x, y] : br[i]) {
            for (int j = 0; j < min(k, y); j++) {
                cc.push_back({i, x});
            }
            k -= min(k, y);
            if (!k) break;
        }
    }
    vector<long long> dp(s + 1);
    for (auto [x, y] : cc) {
        for (int j = s; j >= x; j--) {
            dp[j] = max(dp[j], dp[j - x] + y);
        }
    }
    cout << dp[s] << '\n';
    return 0;
}

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