Submission #393203

#	Time	Username	Problem	Language	Result	Execution time	Memory
393203		peuch	Boxes with souvenirs (IOI15_boxes)	C++17	10 / 100	1 ms	332 KiB

boxes

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

const int MAXN = 1e7 + 10;


long long delivery(int N, int K, int L, int p[]) {
	vector<int> esq, dir;
	long long n = N;
	long long k = K;
	long long l = L;
	for(int i = 0; i < n; i++){
		if(p[i] <= L / 2) esq.push_back(2 * p[i]);
		else dir.push_back(2 * l - 2 * p[i]);
	}
	reverse(dir.begin(), dir.end());
	for(int i = 0; i < esq.size(); i++)
		if(i >= k) esq[i] += esq[i - k];
	for(int i = 0; i < dir.size(); i++)
		if(i >= k) dir[i] += dir[i - k];
	long long ans = ((n + k - 1) / k) * l; 
	long long cnt = n;
	int it1 = 0, it2 = 0;
	while(it1 != esq.size() || it2 != dir.size()){
		if(it1 == esq.size()) it2++;
		else if(it2 == dir.size()) it1++;
		else if(esq[it1] < dir[it2]) it1++;
		else it2++;
		cnt--;
		long long aux = 0;
		if(it1 != 0) aux += esq[it1 - 1];
		if(it2 != 0) aux += dir[it2 - 1];
		aux += ((cnt + k - 1) / k) * l;
		ans = min(ans, aux);
	}
	return ans;
}

Compilation message (stderr)

boxes.cpp: In function 'long long int delivery(int, int, int, int*)':
boxes.cpp:15:28: warning: conversion from 'long long int' to 'std::vector<int>::value_type' {aka 'int'} may change value [-Wconversion]
   15 |   else dir.push_back(2 * l - 2 * p[i]);
      |                      ~~~~~~^~~~~~~~~~
boxes.cpp:18:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   18 |  for(int i = 0; i < esq.size(); i++)
      |                 ~~^~~~~~~~~~~~
boxes.cpp:20:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   20 |  for(int i = 0; i < dir.size(); i++)
      |                 ~~^~~~~~~~~~~~
boxes.cpp:25:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   25 |  while(it1 != esq.size() || it2 != dir.size()){
      |        ~~~~^~~~~~~~~~~~~
boxes.cpp:25:33: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   25 |  while(it1 != esq.size() || it2 != dir.size()){
      |                             ~~~~^~~~~~~~~~~~~
boxes.cpp:26:10: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   26 |   if(it1 == esq.size()) it2++;
      |      ~~~~^~~~~~~~~~~~~
boxes.cpp:27:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   27 |   else if(it2 == dir.size()) it1++;
      |           ~~~~^~~~~~~~~~~~~

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