Submission #914413

#	Time	Username	Problem	Language	Result	Execution time	Memory
914413		Em1L	Knapsack (NOI18_knapsack)	C++14	100 / 100	54 ms	2928 KiB

knapsack

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

using ll = long long;
using pii = pair<int, int>;
using tiii = tuple<int, int, int>;

int main() {
    ios::sync_with_stdio(0); cin.tie(0);

    int n, s; cin >> s >> n;

    vector < vector < pii > > val(s + 1);

    for (int i = 1, v, w, k; i <= n; i++) {
        cin >> v >> w >> k;

        val[w].push_back({ v, min(k, s / w) });
    }

    vector < int > dp(s + 1, -1);

    dp[0] = 0;

    for (int w = 1; w <= s; w++) {
        sort(val[w].begin(), val[w].end(), greater < >());

        int total = 0;

        for (auto [v, k] : val[w]) {
            for (int i = 1; i <= k && total <= s; i++) {
                for (int cur = s; cur >= w; cur--)
                    if (dp[cur - w] >= 0)
                        dp[cur] = max(dp[cur], dp[cur - w] + v);

                total += w;
            }
        }
    }

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

Compilation message (stderr)

knapsack.cpp: In function 'int main()':
knapsack.cpp:30:19: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   30 |         for (auto [v, k] : val[w]) {
      |                   ^

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