Submission #950334

#	Time	Username	Problem	Language	Result	Execution time	Memory
950334		irmuun	Knapsack (NOI18_knapsack)	C++17	100 / 100	54 ms	5360 KiB

knapsack

#include<bits/stdc++.h>

using namespace std;

#define ll long long
#define pb push_back
#define ff first
#define ss second
#define all(s) s.begin(),s.end()
#define rall(s) s.rbegin(),s.rend()

int main(){
    ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0);
    ll s,n;
    cin>>s>>n;
    ll dp[s+5];
    fill(dp,dp+s+1,0);
    vector<pair<ll,ll>>q[s+5];
    for(ll i=1;i<=n;i++){
        ll v,w,k;
        cin>>v>>w>>k;
        q[w].pb({v,k});
    }
    vector<pair<ll,ll>>item;
    for(ll i=1;i<=s;i++){
        sort(all(q[i]));
        for(ll j=0;j<s/i;j++){
            if(q[i].size()==0) break;
            item.pb({i,q[i].back().ff});
            q[i].back().ss--;
            if(q[i].back().ss==0) q[i].pop_back();
        }
    }
    for(auto [w,v]:item){
        for(ll j=s-w;j>=0;j--){
            dp[j+w]=max(dp[j+w],dp[j]+v);
        }
    }
    ll ans=0;
    for(ll i=0;i<=s;i++){
        ans=max(ans,dp[i]);
    }
    cout<<ans;
}

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