Submission #153384

#	Time	Username	Problem	Language	Result	Execution time	Memory
153384		tinjyu	Rectangles (IOI19_rect)	C++14	15 / 100	5064 ms	52720 KiB

rect

#include "rect.h"
#include <iostream>
#include <cstring>
using namespace std;
long long int tag[85][2505],sx,sy,n,m,ans=0,map[85][2505];
int find(int x,int y)
{
	if(tag[x][y]==1)return 0;
	tag[x][y]=1;
	if(x==n-1 || y==m-1)return 0;
	int can1=1,can2=1;
	//cout<<sx<<" "<<x<<" "<<sy<<" "<<y<<endl;
	//cout<<"can1"<<endl;
	for(int i=sx;i<=x;i++)
	{
		long long int ma=0;
		for(int j=sy;j<=y;j++)
		{
			//cout<<i<<" "<<j<<"  ";
			ma=max(map[i][j],ma);
		}
		//cout<<endl;
		if(ma>=map[i][sy-1] || ma>=map[i][y+1])
		{
			can1=0;
			break;
		}
	}
	//cout<<"can2"<<endl;
	for(int j=sy;j<=y;j++)
	{
		long long int ma=0;
		for(int i=sx;i<=x;i++)
		{
			//cout<<i<<" "<<j<<"  ";
			ma=max(map[i][j],ma);
		}
		//cout<<endl;
		if(ma>=map[sx-1][j] || ma>=map[x+1][j])
		{
			can2=0;
			break;
		}
	}
	if(can1==1 && can2==1)
	{
		ans++;
	}
	if(can2==1)find(x,y+1);
	if(can1==1)find(x+1,y);
	else find(x+1,y+1);
	return 0;
}
long long count_rectangles(std::vector<std::vector<int> > a) {
	n=a.size();
	m=a[0].size();
	for(int i=0;i<n;i++)
	{
		for(int j=0;j<m;j++)map[i][j]=a[i][j];
	}
	for(int i=1;i<n-1;i++)
	{
		for(int j=1;j<m-1;j++)
		{
			memset(tag, 0, sizeof(tag)); 
			sx=i,sy=j;
			find(i,j);
		}
	}
	return ans;
}

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