Submission #906217

#	Time	Username	Problem	Language	Result	Execution time	Memory
906217		trinhbaongoc3006	Knapsack (NOI18_knapsack)	C++17	100 / 100	50 ms	3920 KiB

knapsack

#include <bits/stdc++.h>
#define INF int64_t(1e9)
#define pii pair <int, int>
#define pll pair <long long, long long>
#define file "test"
using namespace std;
const int nmax=2005;
const int MOD = 1e9 + 7;

int s, n;
vector <pii> adj[nmax];
long long dp[nmax];
int main()
{
    ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL);
    //freopen(file".inp","r",stdin);
    //freopen(file".out","w",stdout);
    cin >> s >> n;
    for (int i=1;i<=n;i++)
    {
        int w, v, k;
        cin >> v >> w >> k;
        adj[w].push_back({v,k});
    }

    for (int i=1;i<=s;i++)
    {
        if (adj[i].size() == 0) continue;
        sort(adj[i].begin(), adj[i].end(), greater <pii> ()) ;
        int id = 0;
        for (int j=0;j*i<s;j++)
        {
            if (id >= adj[i].size()) break;
            for (int k=s;k>=i;k--)
            {
                dp[k] = max(dp[k], dp[k-i] + adj[i][id].first);
            }
            adj[i][id].second--;
            if (adj[i][id].second == 0) id++;
        }
    }
    cout << dp[s] ;
return 0;
}

Compilation message (stderr)

knapsack.cpp: In function 'int main()':
knapsack.cpp:33:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   33 |             if (id >= adj[i].size()) break;
      |                 ~~~^~~~~~~~~~~~~~~~

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