Submission #1061161

#	Time	Username	Problem	Language	Result	Execution time	Memory
1061161		codefox	Boxes with souvenirs (IOI15_boxes)	C++14	20 / 100	1 ms	600 KiB

boxes

#include<bits/stdc++.h>
#include "boxes.h"

using namespace std;

#define ll long long

ll delivery(int N,int K,int L,int positions[])
{
    deque<ll> first;
    deque<ll> second;
    for (int i = 0;i < N; i++)
    {
        if (positions[i]==0) continue;
        if (positions[i]<=L/2) first.push_back(positions[i]);
        else second.push_front(positions[i]);
    }
    ll sol = 0;
    while (first.size() >= K)
    {
        int t = K;
        sol += first[K-1]*2;
        while (t--) first.pop_front();
    }
    while (second.size() >= K)
    {
        int t = K;
        sol += (L-second[K-1])*2;
        while (t--) second.pop_front();
    }
    if (first.size()==0 && second.size()==0) return sol;
    if (first.size() == 0) return sol+(L-second.back())*2;
    if (second.size()==0) return sol+first.back()*2;
    ll mn = 1e18;
    if (first.size()+second.size()<=K) mn = L;
    else 
    {
        mn = min(mn, L+2*first[first.size()+second.size()-K]);
        mn = min(mn, L+2*second[first.size()+second.size()-K]);
    }
    mn = min(mn, 2*(first.back()+L-second.back()));
    return sol+mn;
}

Compilation message (stderr)

boxes.cpp: In function 'long long int delivery(int, int, int, int*)':
boxes.cpp:19:25: warning: comparison of integer expressions of different signedness: 'std::deque<long long int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   19 |     while (first.size() >= K)
      |            ~~~~~~~~~~~~~^~~~
boxes.cpp:25:26: warning: comparison of integer expressions of different signedness: 'std::deque<long long int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   25 |     while (second.size() >= K)
      |            ~~~~~~~~~~~~~~^~~~
boxes.cpp:35:35: warning: comparison of integer expressions of different signedness: 'std::deque<long long int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   35 |     if (first.size()+second.size()<=K) mn = L;
      |         ~~~~~~~~~~~~~~~~~~~~~~~~~~^~~

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