Submission #674692

#	Time	Username	Problem	Language	Result	Execution time	Memory
674692		Zura	Knapsack (NOI18_knapsack)	C++14	100 / 100	119 ms	7364 KiB

knapsack

#include <bits/stdc++.h>
#define int long long int
#define mod 1000000007
using namespace std;
signed main()
{
    // ios_base::sync_with_stdio(NULL);
    // cin.tie(NULL);
    // freopen("feast.in", "r", stdin);
    // freopen("feast.out", "w", stdout);
    int s, n;
    cin >> s >> n;
    int v[n], w[n], k[n];
    vector<vector<pair<int, int>>> vs(s + 1);
    for (int i = 0; i < n; i++)
    {
        cin >> v[i] >> w[i] >> k[i];
        vs[w[i]].push_back({v[i], k[i]});
    }
    vector<int> val, wt;
    for (int i = 1; i <= s; i++)
    {
        sort(vs[i].begin(), vs[i].end());
        int x = s / i, y = (int)vs[i].size() - 1;
        while (x && y >= 0)
        {
            if (vs[i][y].second > x)
                vs[i][y].second = x;
            x -= vs[i][y].second;
            while (vs[i][y].second--)
            {
                val.push_back(vs[i][y].first);
                wt.push_back(i);
            }
            y--;
        }
    }
    n = (int)val.size();
    int dp[s + 1] = {};
    for (int i = 0; i < n; i++)
    {
        for (int j = s; j >= wt[i]; j--)
        {
            dp[j] = max(dp[j], val[i] + dp[j - wt[i]]);
        }
    }
    cout << dp[s] << "\n";
}

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