Submission #122982

#	Time	Username	Problem	Language	Result	Execution time	Memory
122982		eohomegrownapps	Boxes with souvenirs (IOI15_boxes)	C++14	0 / 100	3 ms	504 KiB

boxes

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

deque<ll> pd;
deque<ll> dpd;

void addElement(ll el, deque<ll> &d){
    while (d.back()>el&&d.size()>0){
        d.pop_back();
    }
    d.push_back(el);
}

void removeElement(ll el, deque<ll> &d){
    if (d.front()==el){
        d.pop_front();
    }
}

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;
            }
        }*/
        
        addElement((l-p[i-1])*2+dp[i-1],pd);
        addElement(dp[i-1],dpd);
        if (i-k-1>=0){
            ll prem=(l-p[i-k-1])*2;
            prem+=dp[i-k-1];
            ll dprem=dp[i-k-1];
            removeElement(dprem,dpd);
            removeElement(prem,pd);
        }
        //cout<<"pset ";for (ll it : pset){cout<<it<<" ";}cout<<endl;
        //cout<<"dpset ";for (ll it : dpset){cout<<it<<" ";}cout<<endl;
        ll a = pd.front();
        ll b = dpd.front()+l;
        ll c = dpd.front()+p[i-1]*2;
        dp[i]=min(min(a,b),c);

        //cout<<dp[i]<<endl;
    }
    return dp[n];
}

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