Submission #1152875

#	Time	Username	Problem	Language	Result	Execution time	Memory
1152875		the_coding_pooh	Rectangles (IOI19_rect)	C++20	27 / 100	442 ms	132328 KiB

rect

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

#define uwu return

using namespace std;

const int SIZE = 2e2 + 5;

int down_min[SIZE][SIZE][SIZE], left_min[SIZE][SIZE][SIZE], up_min[SIZE][SIZE][SIZE], right_min[SIZE][SIZE][SIZE];

long long count_rectangles(vector<vector<int> > a) {
	int n = a.size(), m = a[0].size();
	for (int i = 0; i < n; i++){
		for (int j = 0; j < m; j++){
			for (int k = i + 1; k < n; k++){
				down_min[i][j][j] = k - i;
				if(a[k][j] >= a[i][j])
					break;
			}
			for (int k = j + 1; k < m; k++){
				right_min[j][i][i] = k - j;
				if(a[i][k] >= a[i][j])
					break;
			}
			for (int k = i - 1; k >= 0; k--){
				up_min[i][j][j] = i - k;
				if(a[k][j] >= a[i][j])
					break;
			}
			for (int k = j - 1; k >= 0; k--){
				left_min[j][i][i] = j - k;
				if(a[i][k] >= a[i][j])
					break;
			}
		}
	}
	for (int j = 0; j < m; j++){
		for (int l = 2; l <= n; l++){
			for (int i = 0; i < n; i++){
				left_min[j][i][i + l - 1] = min(left_min[j][i][i + l - 2], left_min[j][i + l - 1][i + l - 1]);
				right_min[j][i][i + l - 1] = min(right_min[j][i][i + l - 2], right_min[j][i + l - 1][i + l - 1]);
			}
		}
	}
	for (int j = 0; j < n; j++){
		for (int l = 2; l <= m; l++){
			for (int i = 0; i < m; i++){
				up_min[j][i][i + l - 1] = min(up_min[j][i][i + l - 2], up_min[j][i + l - 1][i + l - 1]);
				down_min[j][i][i + l - 1] = min(down_min[j][i][i + l - 2], down_min[j][i + l - 1][i + l - 1]);
			}
		}
	}
	long long ret = 0;
	for (int i1 = 0; i1 < n; i1++){
		for (int j1 = 0; j1 < m; j1++){
			for (int i2 = i1 + 2; i2 < n; i2++){
				for (int j2 = j1 + 2; j2 <= j1 + right_min[j1][i1 + 1][i2 - 1]; j2++){
					ret += (j1 >= j2 - left_min[j2][i1 + 1][i2 - 1]) && (i2 <= i1 + down_min[i1][j1 + 1][j2 - 1]) && (i1 >= i2 - up_min[i2][j1 + 1][j2 - 1]);
				}
			}
		}
	}
	uwu ret;
}

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