Submission #1128294

#	Time	Username	Problem	Language	Result	Execution time	Memory
1128294		the_ZHER	Knapsack (NOI18_knapsack)	C++20	73 / 100	430 ms	327680 KiB

knapsack

#include <bits/stdc++.h>
#define int long long
#define boost ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
using namespace std;
const int N = (500*500)+1;
const int inf = 1e9;
const int mod=1e9+7;
struct edge{
    int v,w;
};
bool cmp(edge a,edge b){
    return a.w<=b.w;
}
vector<edge>v;
int dp[2005];
signed main(){
//freopen("input.txt", "r", stdin);
//freopen("output.txt", "w", stdout);
    boost 
    int n,s;
    cin>>s>>n;
    v.push_back({0,0});
    for(int i=1;i<=n;i++){
        edge x;
        int k;
        cin>>x.v>>x.w>>k;
        int cnt=s/x.w;
        k=min(k,cnt);
        for(int j=1;j<=k;j++){
        v.push_back(x);
        }
    }
    int ans=0;
    for(int i=1;i<=v.size()-1;i++){
        for(int j=s;j>=v[i].w;j--){
            if(j==v[i].w){
                dp[j]=max(dp[j],v[i].v);
                ans=max(ans,dp[j]);
                continue;
            }
            dp[j]=max(dp[j],dp[j-v[i].w]+v[i].v);
            if(dp[j-v[i].w]>0){
            ans=max(ans,dp[j]);
        }
    }
    }
    cout<<ans;
}

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