Submission #1157793

#	Time	Username	Problem	Language	Result	Execution time	Memory
1157793		marcus06	Knapsack (NOI18_knapsack)	C++20	73 / 100	1096 ms	18076 KiB

knapsack

#include <bits/stdc++.h>
using namespace std;
using lli = int64_t;

#ifdef LOCAL
#include </home/marcus06/vimcp/Library/debug.h>
#else
#define debug(...) 
#endif

void solve() {
    int n, s;
    cin >> s >> n;
    vector <int> v(n), w(n), k(n);
    for (int i = 0; i < n; ++i) {
        cin >> v[i] >> w[i] >> k[i];
    }

    vector <pair <lli, lli>> items;
    for (int i = 0; i < n; ++i) {
        int x = 1;
        while (k[i] >= x) {
            items.emplace_back((lli) x * w[i], (lli) x * v[i]);
            k[i] -= x;
            x *= 2;
        }
        items.emplace_back((lli) k[i] * w[i], (lli) k[i] * v[i]);
    }

    vector <lli> dp(s + 1, 0);
    for (auto [w, v]: items) {
        for (int i = s; i >= w; --i) dp[i] = max(dp[i], dp[i - w] + v);
    }
    cout << *max_element(dp.begin(), dp.end()) << '\n';
}

int main() {
    std::cin.tie(0)->sync_with_stdio(0);
#ifdef LOCAL
    auto begin = std::chrono::high_resolution_clock::now();
#endif

    int tt = 1;
    while (tt--) {
        solve();
    }

#ifdef LOCAL
    auto end = std::chrono::high_resolution_clock::now();
    auto elapsed = std::chrono::duration_cast<std::chrono::nanoseconds>(end - begin);
    std::cerr << "Time measured: " << elapsed.count() * 1e-9 << " seconds.\n";
#endif
    return 0;
}

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