Submission #295187

#	Time	Username	Problem	Language	Result	Execution time	Memory
295187		theStaticMind	Rectangles (IOI19_rect)	C++14	13 / 100	1002 ms	505592 KiB

rect

#include <bits/stdc++.h>
#include "rect.h"
using namespace std;
int n, m;
bool vis[2500][2500];
void dfs(int x, int y, map<int, int>& R, map<int, int>& C){
	vis[x][y] = true;
	R[x]++;
	C[y]++;
	if(x+1<n && !vis[x+1][y]) dfs(x+1, y,R,C);
	if(x-1>=0 && !vis[x-1][y]) dfs(x-1, y,R,C);
	if(y+1<m && !vis[x][y+1]) dfs(x, y+1, R,C);
	if(y-1>=0 && !vis[x][y-1]) dfs(x, y-1,R,C);

}
long long count_rectangles(std::vector<std::vector<int> > a) {
	n = a.size();
	m = a[0].size();
	long long cnt = 0;
	for(int i = 0; i < n; i++){
		for(int j = 0; j < m; j++){
			vis[i][j] = a[i][j];
		}
	}
	for(int i = 0; i < n; i++){
		for(int j = 0; j < m; j++){
			if(vis[i][j]) continue;
			bool yes = true;

			map<int,int>R,C;
			dfs(i, j, R, C);

			for(auto itr : R){
				yes &= (itr.second == R.begin()->second);
			}
			for(auto itr : C){
				yes &= (itr.second == C.begin()->second);
			}

			yes &= !R.count(0);
			yes &= !R.count(n - 1);
			yes &= !C.count(0);
			yes &= !C.count(m - 1);


			if(yes) cnt++;
		}
	}
	return cnt;
}

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