Submission #756916

#	Time	Username	Problem	Language	Result	Execution time	Memory
756916		Royal	Knapsack (NOI18_knapsack)	C++14	100 / 100	73 ms	36300 KiB

knapsack

#include <bits/stdc++.h>

using namespace std;

#define int long long
int dp[2005][2005];
struct data
{
    int val,cnt;
    friend bool operator < (data x,data y)
    {
        return x.val > y.val;
    }
};
int32_t main(){
    //freopen("vao.inp","r",stdin);
    //freopen("ra.out","w",stdout);
    ios_base::sync_with_stdio(0);
    cin.tie(0);cout.tie(0);
    int m,n;
    cin >> m >> n;
    int n1=n;
    vector < vector < data > > vt(m+1);
    for (int i=1;i<=n;i++)
    {
        int v,w,t;
        cin >> v >> w >> t;
        vt[w].push_back({v,t});
    }
    int i=0;
    for (int w=1;w<=m;w++)
    {
        i++;
        sort(vt[w].begin(),vt[w].end());
        int curw=0,curv=0;
        for (int j=1;j<=m;j++)
        {
            dp[i][j]=dp[i-1][j];
        }
        for (auto f:vt[w])
        {
            if (curw>m) break;
            for (int k=1;k<=f.cnt;k++)
            {
                curw+=w;
                curv+=f.val;
                if (curw>m) break;
                for (int j=curw;j<=m;j++)
                {
                    dp[i][j]=max(dp[i][j],dp[i-1][j-curw]+curv);
                }
            }
        }
    }
    int ans=0;
    for (int j=1;j<=m;j++) ans=max(ans,dp[i][j]);
    cout << ans;
    return 0;
}

Compilation message (stderr)

knapsack.cpp: In function 'int32_t main()':
knapsack.cpp:22:9: warning: unused variable 'n1' [-Wunused-variable]
   22 |     int n1=n;
      |         ^~

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