Submission #295109

#	Time	Username	Problem	Language	Result	Execution time	Memory
295109		theStaticMind	Rectangles (IOI19_rect)	C++14	10 / 100	83 ms	43248 KiB

rect

#include <bits/stdc++.h>
#include "rect.h"
using namespace std;
bool h[3][3][2500][2500];
bool v[2500][2500][3][3];
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 mx = a[i][j];
			for(int k = j; k < m - 1; k++){
				mx = max(mx, a[i][k]);
				h[i][i][j][k] = (mx < a[i][k + 1]);
			}
			mx = a[i][j];
			for(int k = j; k > 0; k--){
				mx = max(mx, a[i][k]);
				h[i][i][k][j] &= (mx < a[i][k - 1]);
			}
		}
	}
	for(int i = 1; i < m - 1; i++){
		for(int j = 1; j < n - 1; j++){
			int mx = a[j][i];
			for(int k = j; k < n - 1; k++){
				mx = max(mx, a[k][i]);
				v[i][i][j][k] = (mx < a[k + 1][i]);
			}
			mx = a[j][i];
			for(int k = j; k > 0; k--){
				mx = max(mx, a[k][i]);
				v[i][i][k][j] &= (mx < a[k - 1][i]);
			}
		}
	}

	for(int i = 1; i < m - 1; i++){
		for(int j = i; j < m - 1; j++){
			for(int k = 1; k < n - 1; k++){
				for(int l = k + 1; l < n - 1; l++){
					h[k][l][i][j] = h[k][l - 1][i][j] & h[l][l][i][j];
				}
			}
		}
	}
	for(int i = 1; i < n - 1; i++){
		for(int j = i; j < n - 1; j++){
			for(int k = 1; k < m - 1; k++){
				for(int l = k + 1; l < m - 1; l++){
					v[k][l][i][j] = v[k][l - 1][i][j] & v[l][l][i][j];
				}
			}
		}
	}

	long long cnt = 0;
	for(int i = 1; i < m - 1; i++){
		for(int j = i; j < m - 1; j++){
			for(int k = 1; k < n - 1; k++){
				for(int l = k; l < n - 1; l++){
					if(h[k][l][i][j] & v[i][j][k][l]) cnt++;
				}
			}
		}
	}
	return cnt;
}

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