Submission #682984

#	Time	Username	Problem	Language	Result	Execution time	Memory
682984		vjudge1	Knapsack (NOI18_knapsack)	C++17	73 / 100	1086 ms	15856 KiB

knapsack

#include <bits/stdc++.h>
#define int long long
#define ii pair<int,int>
#define iii pair<int,ii>
#define ff first
#define ss second

using namespace std;
const int maxn=1e6+5,inf=1e18;
int n,m,nn,k,p,q;
int b[maxn],a[maxn],c[maxn],ans;
int dp[maxn];

void solve()
{
    cin>>m>>nn;
    for (int i=1,x,y,z;i<=nn;i++)
    {
        cin>>x>>y>>z;
        z=min(z,(m/y)+1);
        for (int j=0;j<=30 && z>=(1<<j);j++)
        {
            n++;
            a[n]=(1<<j)*x;
            b[n]=(1<<j)*y;
            z-=1<<j;
        }
        if (z) n++,a[n]=z*x,b[n]=y*z;
    }
    ans=0;
    for (int i=1;i<=n;i++)
        for (int j=m;j>=b[i];j--)
        {
            dp[j]=max(dp[j],dp[j-b[i]]+a[i]);
            ans=max(ans,dp[j]);
        }
    cout<<ans;
}

signed main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr); cout.tie(nullptr);
    solve();
}

• Subtask 1: 12 / 12
• Subtask 2: 17 / 17
• Subtask 3: 20 / 20
• Subtask 4: 24 / 24
• Subtask 5: 0 / 27