Submission #122642

#	Time	Username	Problem	Language	Result	Execution time	Memory
122642		eohomegrownapps	선물상자 (IOI15_boxes)	C++14	70 / 100	2067 ms	308444 KiB

boxes

#include "boxes.h"
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;

long long delivery(int N, int K, int L, int p[]) {
    ll n = N, k=K, l=L;
    vector<ll> dp(n+1,0);
    multiset<ll> pset;
    multiset<ll> dpset;
    
    for (ll i = 1; i<=n; i++){
        /*ll minval = -1;
        for (ll j = max((i-k+1),0LL); j<=i; j++){
            //from j to i inclusive.
            ll val = min((l-p[j])*2LL,min(l,p[i]*2LL));
            if (j>0){
                val+=dp[j-1];
            }
            if (minval==-1||minval>val){
                minval=val;
            }
        }*/
        
        pset.insert((l-p[i-1])*2+dp[i-1]);
        dpset.insert(dp[i-1]);
        //cout<<"pset ";for (ll it : pset){cout<<it<<" ";}cout<<endl;
        //cout<<"dpset ";for (ll it : dpset){cout<<it<<" ";}cout<<endl;
        ll a = (*pset.begin());
        ll b = (*dpset.begin())+l;
        ll c = (*dpset.begin())+p[i-1]*2;
        dp[i]=min(min(a,b),c);

        //cout<<dp[i]<<endl;
        if (i-k>=0){
            ll prem=(l-p[i-k])*2;
            prem+=dp[i-k];
            ll dprem=dp[i-k];
            dpset.erase(dpset.find(dprem));
            pset.erase(pset.find(prem));
        }
    }
    return dp[n];
}

• Subtask 1: 10 / 10
• Subtask 2: 10 / 10
• Subtask 3: 15 / 15
• Subtask 4: 15 / 15
• Subtask 5: 20 / 20
• Subtask 6: 0 / 30