Submission #771295

#	Time	Username	Problem	Language	Result	Execution time	Memory
771295		caganyanmaz	Boxes with souvenirs (IOI15_boxes)	C++17	0 / 100	1 ms	212 KiB

boxes

#include <bits/stdc++.h>
#define pb push_back
using namespace std;


long long delivery(int N, int K, int L, int positions[])
{
        vector<long long> lpos, rpos;
        int middle = 0;
        for (int i = 0; i < N; i++)
                if (positions[i] < (L / 2))
                        lpos.pb(positions[i]);
                else if (positions[i] > (L / 2))
                        rpos.pb(-positions[i]);
                else
                        middle++;
        sort(lpos.begin(), lpos.end());
        sort(rpos.begin(), rpos.end());
        vector<int> ldp(lpos.size()+1), rdp(rpos.size()+1);
        for (int i = 1; i <= lpos.size(); i++)
        {
                if (i >= K)
                        ldp[i] += ldp[i-K];
                ldp[i] += static_cast<long long>(lpos[i-1]) * 2;
        }
        for (int i = 1; i <= rpos.size(); i++)
        {
                if (i >= K)
                        rdp[i] += rdp[i-K];
                rdp[i] += static_cast<long long>(L+rpos[i-1]) * 2;
        }
        long long result = ldp[lpos.size()] + rdp[rpos.size()] + (middle / K) * L;
        if (middle%K)
                result += L;
        for (int i = 1; i <= 4; i++)
        {
                long long remainder = K * i + (middle % K);
                for (int lremainder = 0; lremainder <= remainder; lremainder++)
                        result = min(result, ldp[lpos.size()-lremainder] + rdp[rpos.size()-remainder+lremainder] + ((middle + remainder) / K) * L);
        }
        return result;
}

Compilation message (stderr)

boxes.cpp: In function 'long long int delivery(int, int, int, int*)':
boxes.cpp:20:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   20 |         for (int i = 1; i <= lpos.size(); i++)
      |                         ~~^~~~~~~~~~~~~~
boxes.cpp:24:63: warning: conversion from '__gnu_cxx::__alloc_traits<std::allocator<long long int>, long long int>::value_type' {aka 'long long int'} to '__gnu_cxx::__alloc_traits<std::allocator<int>, int>::value_type' {aka 'int'} may change value [-Wconversion]
   24 |                 ldp[i] += static_cast<long long>(lpos[i-1]) * 2;
      |                                                               ^
boxes.cpp:26:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   26 |         for (int i = 1; i <= rpos.size(); i++)
      |                         ~~^~~~~~~~~~~~~~
boxes.cpp:30:65: warning: conversion from 'long long int' to '__gnu_cxx::__alloc_traits<std::allocator<int>, int>::value_type' {aka 'int'} may change value [-Wconversion]
   30 |                 rdp[i] += static_cast<long long>(L+rpos[i-1]) * 2;
      |                                                                 ^

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