Submission #598098

#	Time	Username	Problem	Language	Result	Execution time	Memory
598098		yutabi	Rectangles (IOI19_rect)	C++14	10 / 100	1 ms	340 KiB

rect

#include "rect.h"


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







long long count_rectangles(std::vector<std::vector<int> > a)
{
	if(a.size()<3)
	{
		return 0;
	}

	vector <bool> valid(50000,1);

	int maxi=0;

	for(int i=0;i<a[1].size();i++)
	{
		if(a[1][i]>=a[0][i] || a[1][i]>=a[2][i])
		{
			valid[i]=0;

			maxi=a[1][i];
		}

		if(a[1][i]>=maxi)
		{
			maxi=a[1][i];

			valid[i]=0;
		}
	}

	maxi=0;

	for(int i=a[1].size()-1;i>=0;i--)
	{
		if(a[1][i]>=a[0][i] || a[1][i]>=a[2][i])
		{
			valid[i]=0;

			maxi=a[1][i];
		}

		if(a[1][i]>=maxi)
		{
			maxi=a[1][i];

			valid[i]=0;
		}
	}

	vector <int> s;

	int res=0;

	for(int i=0;i<a[1].size();i++)
	{
		while(s.size() && a[1][i]>s.back())
		{
			s.pop_back();
		}

		if(valid[i]==1)
		{
			res++;

			if(s.size() && s.back()==a[1][i])
			{
				res--;
			}
		}

		s.push_back(a[1][i]);
	}

	





	return res;
}

Compilation message (stderr)

rect.cpp: In function 'long long int count_rectangles(std::vector<std::vector<int> >)':
rect.cpp:24:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   24 |  for(int i=0;i<a[1].size();i++)
      |              ~^~~~~~~~~~~~
rect.cpp:64:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   64 |  for(int i=0;i<a[1].size();i++)
      |              ~^~~~~~~~~~~~

• Subtask 1: 0 / 8
• Subtask 2: 0 / 7
• Subtask 3: 0 / 12
• Subtask 4: 0 / 22
• Subtask 5: 10 / 10
• Subtask 6: 0 / 13
• Subtask 7: 0 / 28