Follow up for "Unique Paths": Now consider if some obstacles are added to the grids. How many unique paths would there be? An obstacle and empty space is marked as 1 and 0 respectively in the grid. For example, There is one obstacle in the middl…

A robot is located at the top-left corner of a m x n grid (marked 'Start' in the diagram below). The robot can only move either down or right at any point in time. The robot is trying to reach the bottom-right corner of the grid (marked 'Finish' in t…

题目: Follow up for "Unique Paths": Now consider if some obstacles are added to the grids. How many unique paths would there be? An obstacle and empty space is marked as 1 and 0 respectively in the grid. For example, There is one obstacle in the m…

Follow up for "Unique Paths": Now consider if some obstacles are added to the grids. How many unique paths would there be? An obstacle and empty space is marked as 1 and 0 respectively in the grid. For example, There is one obstacle in the middl…

Follow up for "Unique Paths": Now consider if some obstacles are added to the grids. How many unique paths would there be? An obstacle and empty space is marked as 1 and 0 respectively in the grid. For example, There is one obstacle in the middl…

[题目] A robot is located at the top-left corner of a m x n grid (marked 'Start' in the diagram below). The robot can only move either down or right at any point in time. The robot is trying to reach the bottom-right corner of the grid (marked 'Finish'…

[ [1, 4, 7, 11, 15], [2, 5, 8, 12, 19], [3, 6, 9, 16, 22], [10, 13, 14, 17, 24], [18, 21, 23, 26, 30] ] 观察,从左到右递增,从上到下递增.似乎找不到什么其他规律.第一想法是二分,笨方法. 感觉这个是有序数组求两个数的和为sum的扩展.巧妙啊!看了题解才会的. 观察左下角或者右下角的元素.所有比18大的,都在18右边.比18小的都在它上边. 只能感叹啊!什么时候能有这样的功力呢? bool se…

这是“不同路径” 的进阶问题:现在考虑网格中有障碍物.那样将会有多少条不同的路径从左上角到右下角?网格中的障碍物和空位置分别用 1 和 0 来表示.例如,如下所示在 3x3 的网格中有一个障碍物.[  [0,0,0],  [0,1,0],  [0,0,0]]一共有 2 条不同的路径从左上角到右下角.注意: m 和 n 的值均不超过 100.详见:https://leetcode.com/problems/unique-paths-ii/description/ Java实现: 参考:https:…

题目 Follow up for "Unique Paths": Now consider if some obstacles are added to the grids. How many unique paths would there be? An obstacle and empty space is marked as 1 and 0 respectively in the grid. For example, There is one obstacle in the mi…

1.题目描述 2.题目分析 题目要求返回杨辉三角的某一行,需要将杨辉三角的某行的全部计算出来. 3.代码实现 vector<int> getRow(int rowIndex) { ) ,); vector<,}; ; while(n <= rowIndex){ vector<int> r = calNextline(b); b.resize( r.size() ); ; i < r.size(); i++){ b[i] = r[i]; } n++; } retur…