Submission #427126

#	Time	Username	Problem	Language	Result	Execution time	Memory
427126		dreezy	Rectangles (IOI19_rect)	C++17	0 / 100	68 ms	23072 KiB

rect

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

using namespace std;
#define ll long long



/*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: 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