Submission #619035

#	Time	Username	Problem	Language	Result	Execution time	Memory
619035		A_D	Boxes with souvenirs (IOI15_boxes)	C++14	100 / 100	703 ms	301892 KiB

boxes

#include "boxes.h"

#include <bits/stdc++.h>


using namespace std;



const int N=1e7+10;


long long pre[N];
long long suf[N];

deque<pair<long long,long long>> deq;


long long delivery(int N, int K, int L, int p[]) {

    long long ans=1e18;


    deq.push_back({(int)0,(int)-1});

    for(int i=0;i<N;i++){
        if(deq[0].second+K<i)deq.pop_front();
        long long h=p[i];

        long long u=deq[0].first;

        u+=h;

        pre[i]=u+min(h,L-h);


        deq.push_back({pre[i],i});
    }
    ans=pre[N-1];

    deq.clear();
    deq.push_back({0,N});

    for(int i=N-1;i>=0;i--){
        if(deq[0].second-K>i)deq.pop_front();
        long long h=p[i];

        long long u=deq[0].first;

        u+=(L-h);

        suf[i]=u+min(h,L-h);
    //    for(auto x:deq)cout<<x.first<<" ";cout<<"\n";

        deq.push_back({suf[i],i});
    }

    ans=min(ans,suf[0]);

    for(int i=0;i<N-1;i++){
        ans=min(ans,pre[i]+suf[i+1]);
    }

  //  for(int i=0;i<N;i++)cout<<pre[i]<<" ";cout<<"\n";
//    for(int i=0;i<N;i++)cout<<suf[i]<<" ";cout<<"\n";


    return ans;
}

Compilation message (stderr)

boxes.cpp: In function 'long long int delivery(int, int, int, int*)':
boxes.cpp:19:24: warning: declaration of 'N' shadows a global declaration [-Wshadow]
   19 | long long delivery(int N, int K, int L, int p[]) {
      |                    ~~~~^
boxes.cpp:10:11: note: shadowed declaration is here
   10 | const int N=1e7+10;
      |           ^

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