Submission #1135927

#	Time	Username	Problem	Language	Result	Execution time	Memory
1135927		ashokanr	Knapsack (NOI18_knapsack)	C++20	100 / 100	48 ms	3568 KiB

knapsack

#include <bits/stdc++.h>
#define int long long
using namespace std;
const int N = 1e5+5;
int dp[N];
vector <int> W,V;
vector <int> v[2005];
struct mitt
{
    int v,w,k;
    bool operator < (const mitt &tim)
    {
        return v > tim.v;
    }
} a[N];
main()
{
    ios_base::sync_with_stdio(0);

    int n,s;
    cin >> s >> n;
    for(int i=1;i<=n;++i)
    {
        cin >> a[i].v >> a[i].w >> a[i].k;
    }
    sort(a+1,a+1+n);
    W.push_back(0);
    V.push_back(0);
    for(int i=1;i<=n;i++)
    {
       while (a[i].k-- && v[a[i].w].size() <= s / a[i].w)
        v[a[i].w].push_back(a[i].v);
    }
    for(int w=1;w<=s;w++)
    {
        for(auto x:v[w])
        {
            W.push_back(w);
            V.push_back(x);
        }
    }
//    for(auto x:W) cout << x << " ";
//    cout << endl;
//    for(auto x:V) cout << x << " ";
    for(int i=1;i<=W.size()-1;++i)
    {
        for(int j=s;j;--j)
        {
            if (j >= W[i]) dp[j] = max(dp[j],dp[j-W[i]] + V[i]);
        }
    }
    cout << *max_element(dp,dp+s+1);


}

Compilation message (stderr)

knapsack.cpp:16:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   16 | main()
      | ^~~~

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