Submission #427261

#	Time	Username	Problem	Language	Result	Execution time	Memory
427261		dreezy	Rectangles (IOI19_rect)	C++17	25 / 100	5090 ms	22672 KiB

rect

#include "rect.h"
#include <bits/stdc++.h>

using namespace std;
#define ll long long

long long count_rectangles(vector<vector<int> > a) {
	int n = a.size();
	int m = a[0].size();
	
	ll ans = 0;
	for(int width = 0; width < n - 2; width++){
		for(int height = 0; height < m -2; height++){
			for(int starti = 1; starti < n -1 - width; starti++){
				for(int startj = 1; startj < m - 1 - height; startj++){
					bool good = true;
					//cout <<starti<<", "<<startj<<": "<<starti + width <<", "<<startj + width<<endl;
					for(int i =starti; i<=starti + width ;i++){
						for(int j =startj ;j <=startj + height; j++){
							int cnt = 0;
							if(a[starti-1][j] > a[i][j])
								cnt++;
							if(a[starti + width + 1][j] > a[i][j])
								cnt++;
							if(a[i][startj -1] > a[i][j])
								cnt++;
							if(a[i][startj + height+1] > a[i][j])
								cnt++;
								
							if(cnt != 4)
								{
									//cout << ":BAD:"<<starti<<", "<<startj<<": "<<width<<", "<<height<<endl;
									good = false;
									break;
								}
						
						}
						if(!good)
							break;
					}
					if(good){
						//cout << starti<<", "<<startj<<": "<<width<<", "<<height<<endl;
					}
					ans += good;
				}
			}
		}
	}
	
	
	return ans;
}

/*subtask 5: debug*/
/*
long long count_rectangles(vector<vector<int> > a) {
	int n = a.size();
	int m = a[0].size();
	
	ll ans = 0;
	for(int i =1; i<n-1 ;i++){
		int leftind = 0;
		for(int j =1 ;j <m-1; j++){
			int cnt = 0;
			cout << a[i][j]<<", "<<leftind<< ": "<<a[i][leftind]<<endl;
			bool pos = true;

			if(a[i-1][j] > a[i][j])
				cnt++;
			else
				pos = false;
			if(a[i+1][j] > a[i][j])
				cnt++;
			else
				pos = false;
			if(a[i][leftind] > a[i][j])
				cnt++;
			else 
				pos = false;
			if(a[i][j+1] > a[i][j])
				cnt++;
				

			if(!pos){
				leftind = j;
			}
				
			cout << pos<<" & "<<cnt<<endl;
			if(cnt == 4){
				for(int ii = leftind+1; ii < j; ii++){
					if(a[i][ii] >= a[i][j+1]){
						leftind = ii;
					}
				}
				ll curans = 0;
				for(int ii = leftind +1; ii<=j; ii++){
					if(a[i][ii] < a[i][ii - 1]){
						curans++;
						cout << ii<<":";
					}
				}
				cout << "!"<<leftind<<endl;
				ans+= curans;
			}
		}
	}
	return ans;
}


*/

/**************/

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