Submission #1113923

#	Time	Username	Problem	Language	Result	Execution time	Memory
1113923		dyogorb	Knapsack (NOI18_knapsack)	C++14	100 / 100	93 ms	3780 KiB

knapsack

#include <bits/stdc++.h>

using namespace std;

int main(){
    int s, n;
    cin >> s >> n;

    vector<tuple<int, int, int>> entries;
    for (int i = 0; i < n; i++)
    {
        int v, w, k;
        cin >> v >> w >> k;

        entries.push_back({w, -v, k});
    }

    sort(entries.begin(), entries.end());

    vector<int> used(s + 1);
    vector<int> pw;
    vector<int> pv;

    for (const auto [w, v, k] : entries)
    {                     
        int total = s / w;
        int i = 0;

        while(used[w] < total && i < k){
            used[w] ++;
            i ++;
            pv.push_back(v * -1);
            pw.push_back(w);
        }
    }

    vector<int> dp(s + 1, 0);    

    for (int i = 0; i < pw.size(); i++)
    {
        int v = pv[i], w = pw[i];        
        for (int j = s; j > 0; j--)
        {
            if(j - w >= 0) dp[j] = max(dp[j], dp[j - w] + v);
        }
        
    }

    int ans = 0;

    for (int i = 0; i <= s; i++)
    {
        ans = max(ans, dp[i]);
    }
    
    cout << ans << endl;
    
}

Compilation message (stderr)

knapsack.cpp: In function 'int main()':
knapsack.cpp:24:21: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   24 |     for (const auto [w, v, k] : entries)
      |                     ^
knapsack.cpp:39:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   39 |     for (int i = 0; i < pw.size(); i++)
      |                     ~~^~~~~~~~~~~

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