Submission #491185

#	Time	Username	Problem	Language	Result	Execution time	Memory
491185		tarche	Knapsack (NOI18_knapsack)	C++17	0 / 100	1 ms	972 KiB

knapsack

#include <bits/stdc++.h>

using namespace std;

const int INF = 1e9;

struct Item {
    int value, weight, amount;
};

int solve(const vector<Item>& items, vector<vector<int>>& dp, int i, int j, int k) {
    if (i < 0 || j < 0 || k < 0)
        return -INF;
    if (dp[i][j] != -1)
        return dp[i][j];
    int lhs = solve(items, dp, i, j - items[i].weight, k - 1) + items[i].value;
    int rhs = solve(items, dp, i - 1, j, items[i - 1].amount);
    dp[i][j] = max(lhs, rhs);

    return dp[i][j];
}

int main() {
    int S, N;
    cin >> S >> N;

    vector<Item> items(N);
    for (int i = 0; i < N; i++)
        cin >> items[i].value >> items[i].weight >> items[i].amount;

    sort(items.begin(), items.end(), [&](const Item& lhs, const Item& rhs) {
        return lhs.value < rhs.value;
    });

    vector<vector<int>> dp(N, vector<int>(S + 1, -1));
    dp[0][0] = 0;

    int ans = solve(items, dp, N - 1, S, items[N - 1].amount);

    cout << ans << '\n';
}

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