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 the diagram below).
How many possible unique paths are there?
左上角到右下角唬党,每次走下和右方向换薄,求一共有多少的走法。
代碼:
參考代碼
解題思路:動態(tài)規(guī)劃,定義二維數(shù)組v搪搏,從左上角開始,計(jì)算每一個(gè)值飘哨,最后返回 v[m-1][n-1]定拟,即可。