Submission #975172

#	Time	Username	Problem	Language	Result	Execution time	Memory
975172		vjudge1	Knapsack (NOI18_knapsack)	C++17	0 / 100	74 ms	262144 KiB

knapsack

#include<bits/stdc++.h>
using namespace std;
#define int long long

int s,n;
vector<pair<int,int> > weight[2005];
vector<pair<int,int> > item;
int dp[20005][2005];

int cek(int idx,int brt){
    if(brt<0)return -1e15;
    if(idx==item.size())return 0;
    int &res=dp[idx][brt];
    if(res!=-1)return res;
    pair<int,int>p=item[idx];
    res=max(cek(idx+1,brt),cek(idx+1,brt-p.first)+p.second);
    return res;
}

signed main(){
    ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
    cin>>s>>n;
    for(int r=0;r<n;r++){
        int v,w,k;
        cin>>v>>w>>k;
        weight[w].push_back({v,k});
    }
    for(int d=1;d<=2000;d++){
        sort(weight[d].begin(),weight[d].end());
        int maks= 2000/d +1;
        while(maks>0 && !weight[d].empty()){
            maks--;
            pair<int,int> &p=weight[d].back();
            item.push_back({d,p.first});
            p.second--;
            if(p.second==0){
                weight[d].pop_back();
            }
        }
    }
    memset(dp,-1,sizeof dp);
    cout<<cek(0,s);
}

Compilation message (stderr)

knapsack.cpp: In function 'long long int cek(long long int, long long int)':
knapsack.cpp:12:11: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   12 |     if(idx==item.size())return 0;
      |        ~~~^~~~~~~~~~~~~

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