Submission #428575

#	Time	Username	Problem	Language	Result	Execution time	Memory
428575		Hazem	Rectangles (IOI19_rect)	C++14	0 / 100	31 ms	12928 KiB

rect

#include "rect.h"
#include <bits/stdc++.h>
 
#define LL long long
 
using namespace std;
 
const int N = 1000;
 
int n,m;
int col[5][N][N],row[N][N][10];
 
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++){
			int mx = 0;
			for(int k=j+1;k<m;k++){
				if(k-j>1&&mx<a[i][j]&&mx<a[i][k])
					row[j][k][i]++;
				mx = max(mx,a[i][k]);
			}
		}
 
	for(int i=0;i<m;i++)
		for(int j=0;j<n;j++){
			int mx = 0;
			for(int k=j+1;k<n;k++){
				if(k-j>1&&mx<a[j][i]&&mx<a[k][i])
					col[j][k][i]++;
				if(i)
					col[j][k][i] += col[j][k][i-1];
				mx = max(mx,a[k][i]);
			}
		}
 
	
	LL ans = 0;
	for(int i=0;i<n;i++)
		for(int j=0;j<m;j++)
			for(int k=j+1;k<m;k++){
				int  q = 1;
				for(int k1 = i+1;k1<n;k1++){
					if(k1-i>1&&k-j>1)
						ans += q&(col[i][k1][k-1]-col[i][k1][j]==(k-j-1));
					q &= row[j][k][k1];
				}
			}
	return ans;
}

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