Submission #932469

#	Time	Username	Problem	Language	Result	Execution time	Memory
932469		ironic	Knapsack (NOI18_knapsack)	C++17	100 / 100	62 ms	4408 KiB

knapsack

#include <bits/stdc++.h>


using namespace std;
using ll = long long;

void solve(){
    int s, n; cin >> s >> n;
    map<int, vector<pair<int, int>>> mp;

    int arr[3];
    for(int i = 0; i<n; i++){
        cin >> arr[0] >> arr[1] >> arr[2];
        mp[arr[1]].push_back({arr[0], arr[2]});
    }
    int a[s+1]{};
    memset(a, -1e9, sizeof(a));
    a[0] = 0;



    for(auto j : mp){
        int w = j.first;
        sort(j.second.rbegin(), j.second.rend());
        int amt = s/w;
        for(auto item : j.second){
            if(!amt) break;
            for(int i = 0; i<item.second; i++){
                if(!amt) break;
                amt--;
                for(int u = s; u>=w; u--) a[u] = max(a[u], a[u-w]+item.first);
            }

        }
    }



    // for(int i = 0; i<=s; i++) cout << a[i] << ' ';
    


    cout << *max_element(a, a+s+1) << '\n';
}


signed main()
{
    // #ifndef LOCAL
    //   freopen(".in","r",stdin);
    //   freopen(".out","w",stdout); 
    // #endif

    ios_base::sync_with_stdio(0); cin.tie(0);
    int t = 1;
    // cin >> t;
    while(t--) solve();
}

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