Submission #1212620

#	Time	Username	Problem	Language	Result	Execution time	Memory
1212620		LinkedArray	Knapsack (NOI18_knapsack)	C++17	37 / 100	1 ms	328 KiB

knapsack

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

// 2 ^ 10 ~= 10 ^ 3 => 2 ^ 30 > 10 ^ 9
const int MAX_N = 1e5, MAX_S = 2e3, MAX_K = 1e9, MAX_K_BIT = 30;

int v[MAX_N + 1], wi[MAX_N + 1], k[MAX_N + 1];
vector<pair<int, int>> items;
int dp[MAX_S + 1];

signed main () {
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    
    int s, n, i, j, w, new_w, put2;
    
    cin >> s >> n;
    for (i = 1; i <= n; i++) {
        cin >> v[i] >> wi[i] >> k[i];
        
        put2 = 1;
        while (k[i] > 0) {
            k[i] -= put2;
            items.push_back(make_pair(wi[i] * put2, v[i] * put2));
            put2 = min(2 * put2, k[i]);
        }
    }
    
    // bounded
    for (auto [item_w, item_v] : items) {
        // cout << "[" << item_w << ", " << item_v << "]\n";
        for (w = s; w >= 0; w--) {
            new_w = w + item_w;
            if (new_w <= s) {
                dp[new_w] = max(dp[new_w], dp[w] + item_v);
            }
        }
    }

    
    cout << dp[s];
    return 0;
}

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