Submission #268573

#	Time	Username	Problem	Language	Result	Execution time	Memory
268573		A02	Boxes with souvenirs (IOI15_boxes)	C++14	20 / 100	1 ms	384 KiB

boxes

#include "boxes.h"
#include <vector>
#include <set>
#include <algorithm>
#include <utility>
#include <iostream>

using namespace std;

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

    vector<long long> left_positions;
    vector<long long> right_positions;

    long long no_round_trips = 0;

    for (int i = 0; i < N; i++){
        if (p[i] <= L/2){
            left_positions.push_back(p[i]);
        }
    }

    for (int i = N - 1; i >= 0; i--){
        if (p[i] > L/2){
            right_positions.push_back(L - p[i]);
        }
    }

    int current_boxes = 0;

    while (left_positions.size() > 0){
        no_round_trips += left_positions[left_positions.size() - 1] * 2;

        current_boxes = K;

        for (;left_positions.size() && current_boxes > 0; current_boxes--){
            left_positions.pop_back();
        }

    }

    while (right_positions.size() > 0){
        no_round_trips += right_positions[right_positions.size() - 1] * 2;

        current_boxes = K;

        for (; right_positions.size() && current_boxes > 0; current_boxes--){
            right_positions.pop_back();
        }

    }

    long long one_round_trip = L;

    for (int i = 0; i < N; i++){
        if (p[i] <= L/2){
            left_positions.push_back(p[i]);
        }
    }

    for (int i = N - 1; i >= 0; i--){
        if (p[i] > L/2){
            right_positions.push_back(L - p[i]);
        }
    }

    int current_l_index = 0;
    current_boxes = 0;

    while (current_l_index != left_positions.size()){

        current_boxes = K;

        while (current_boxes > 0 && current_l_index != left_positions.size()){
            current_boxes--;
            current_l_index++;
        }

        if (current_l_index != left_positions.size()){
            one_round_trip += left_positions[current_l_index] * 2;
        }
    }

    for (; right_positions.size() && current_boxes > 0; current_boxes--){
        right_positions.pop_back();
    }

    while (right_positions.size() > 0){
        one_round_trip += right_positions[right_positions.size() - 1] * 2;

        current_boxes = K;

        for (; right_positions.size() && current_boxes > 0; current_boxes--){
            right_positions.pop_back();
        }

    }


    return min(one_round_trip, no_round_trips);

    return 0;
}

Compilation message (stderr)

boxes.cpp: In function 'long long int delivery(int, int, int, int*)':
boxes.cpp:70:28: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   70 |     while (current_l_index != left_positions.size()){
      |            ~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
boxes.cpp:74:53: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   74 |         while (current_boxes > 0 && current_l_index != left_positions.size()){
      |                                     ~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
boxes.cpp:79:29: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   79 |         if (current_l_index != left_positions.size()){
      |             ~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~

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