Submission #393207

#	Time	Username	Problem	Language	Result	Execution time	Memory
393207		peuch	Boxes with souvenirs (IOI15_boxes)	C++17	25 / 100	1 ms	208 KiB

boxes

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

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

Compilation message (stderr)

boxes.cpp: In function 'long long int delivery(int, int, int, int*)':
boxes.cpp:15:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   15 |  for(int i = 0; i < esq.size(); i++)
      |                 ~~^~~~~~~~~~~~
boxes.cpp:17:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   17 |  for(int i = 0; i < dir.size(); i++)
      |                 ~~^~~~~~~~~~~~
boxes.cpp:22:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   22 |  while(it1 != esq.size() || it2 != dir.size()){
      |        ~~~~^~~~~~~~~~~~~
boxes.cpp:22:33: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   22 |  while(it1 != esq.size() || it2 != dir.size()){
      |                             ~~~~^~~~~~~~~~~~~
boxes.cpp:23:10: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   23 |   if(it1 == esq.size()) it2++;
      |      ~~~~^~~~~~~~~~~~~
boxes.cpp:24:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   24 |   else if(it2 == dir.size()) it1++;
      |           ~~~~^~~~~~~~~~~~~

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