제출 #426827

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
426827		dreezy	Rectangles (IOI19_rect)	C++17	0 / 100	1 ms	332 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;
	ll curstreak =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][leftind] <= a[i][j]){
				leftind = j -1;
				pos = false;
			}
			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++;
			if(a[i][j+1] > a[i][j])
				cnt++;
				
			if(pos)
				curstreak++;
			else
				curstreak = 0;
			//cout << pos<<": "<<curstreak<<endl;
			if(cnt == 4){
				ans+= curstreak * (curstreak + 1)/2;
			}
		}
	}
	return ans;
}
/**************/

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