Description We are given a figure consisting of only horizontal and vertical line segments. Our goal is to count the number of all different rectangles formed by these segments. As an example, the number of rectangles in the Figures 1 and 2 are 5 and…
题目链接 问题描述 一个棋盘有n条横线,m条竖线,上面有k个黑点,问有多少个不包含黑点的矩形. 数据范围: n和m最大为1000,k最大为10 方法一:动态规划 复杂度n*m*k. import java.awt.Point; import java.util.Comparator; import java.util.LinkedList; import java.util.List; import java.util.Scanner; public class Main { int n, m;…
[抄题]: Given a grid where each entry is only 0 or 1, find the number of corner rectangles. A corner rectangle is 4 distinct 1s on the grid that form an axis-aligned rectangle. Note that only the corners need to have the value 1. Also, all four 1s used…