Submission #415329

#	Time	Username	Problem	Language	Result	Execution time	Memory
415329		peuch	Rectangles (IOI19_rect)	C++17	49 / 100	4944 ms	142000 KiB

rect

#include "rect.h"
#include<bits/stdc++.h>
using namespace std;
 
const int MAXN = 710;
 
bitset<MAXN> lVal[MAXN][MAXN];
bitset<MAXN> cVal[MAXN][MAXN];
 
long long count_rectangles(std::vector<std::vector<int> > a) {
	int n = a.size();
	int m = a[0].size();
	
	for(int i = 1; i < n - 1; i++){
		for(int j = 1; j < m - 1; j++){
			int maxi = 0;
			for(int k = j; k < m - 1; k++){
				maxi = max(maxi, a[i][k]);
				lVal[i][j][k] = maxi < a[i][j - 1] && maxi < a[i][k + 1];
			}
		}
	}
	for(int i = 1; i < m - 1; i++){
		for(int j = 1; j < n - 1; j++){
			int maxi = 0;
			for(int k = j; k < n - 1; k++){
				maxi = max(maxi, a[k][i]);
				cVal[i][j][k] = maxi < a[j - 1][i] && maxi < a[k + 1][i];
			}
		}
	}
	
	long long ans = 0;
	
	for(int i = 1; i < n - 1; i++){
		for(int j = 1; j < m - 1; j++){
			bitset<MAXN> marc = lVal[i][j];
			for(int k = i; k < n - 1; k++){
				marc &= lVal[k][j];
				for(int l = j; l < m - 1; l++){
					if(cVal[l][i][k] == 0) break;
					ans += marc[l];
				}
			}
		}
	}
	
	return ans;
}

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