Submission #261400

#	Time	Username	Problem	Language	Result	Execution time	Memory
261400		SuperJava	Rectangles (IOI19_rect)	C++17	27 / 100	5096 ms	89336 KiB

rect

#include "rect.h"
#include <vector>
#include <cmath>
#include <iostream>
#define sz(a) (a.size())
using namespace std;

int spr[705][11][705];
int spc[705][11][705];
int lg[705];

int query_r(int row, int l, int r){
	int logo = lg[r-l+1];
	return max(spr[row][logo][l],spr[row][logo][r-(1<<logo)+1]);
}

int query_c(int col, int l, int r){
	int logo = lg[r-l+1];
	return max(spc[col][logo][l],spc[col][logo][r-(1<<logo)+1]);
}

long long count_rectangles(vector<vector<int>> a) {
	for (int i = 1; i < 705; ++i){
		lg[i] = log2(i);
	}
	int n = sz(a);
	int m = sz(a[0]);
	int answer = 0;
	for (int i = 0; i < n; ++i){
		for (int j = 0; j < m; ++j){
			spr[i][0][j] = a[i][j];
		}
		for (int k = 1; k < 11; ++k){
			for (int j = 0; j < m-(1<<k)+1; ++j){
				spr[i][k][j] = max(spr[i][k-1][j], spr[i][k-1][j+(1<<(k-1))]);
			}
		}
	}
	for (int i = 0; i < m; ++i){
		for (int j = 0; j < n; ++j){
			spc[i][0][j] = a[j][i];
		}
		for (int k = 1; k < 11; ++k){
			for (int j = 0; j < n-(1<<k)+1; ++j){
				spc[i][k][j] = max(spc[i][k-1][j], spc[i][k-1][j+(1<<(k-1))]);
			}
		}
	}
	for (int r1 = 1; r1 < n-1; ++r1){
		for (int c1 = 1; c1 < m-1; ++c1){
			for (int r2 = r1; r2 < n-1; ++r2){
				if(a[r2][c1] >= a[r2][c1-1] ||
					a[r2][c1] >= a[r1-1][c1]){
					break;
				}
				bool milhem = false;
				for (int c2 = c1; c2 < m-1 && !milhem; ++c2){
					bool good = true;
					for (int i = r1; i <= r2 && good; ++i){
						int mx = query_r(i, c1, c2);
						if(mx >= a[i][c1-1]){
							good = false;
							milhem = true;
						}
						if(mx >= a[i][c2+1]){
							good = false;
						}
					}
					for (int i = c1; i <= c2 && good; ++i){
						int mx = query_c(i, r1, r2);
						if(mx >= a[r1-1][i] || mx >= a[r2+1][i]){
							good = false;
							milhem = true;
						}
					}
					if(good){
						answer++;
					}
				}
			}
		}
	}
	return answer;
}

• 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