原题:https://leetcode.com/problems/unique-paths/#/description 就是给了一个n*m的矩阵。从top-left顶点往bottom-right终点走。每次只能往bottom,或者往right走。(还不算太可怜,每次还有两种选择。往往我们只有一种选择。)。 目标是:找出unique path的个数。 思路:计算解个数的题多半是用DP。 1. dp[i][...
https://leetcode.com/problems/unique-paths/ publicclassSolution {publicintuniquePaths(intm,intn) {int[][] paths =newint[m][n];for(inti = 0; i < m; ++i) {for(intj = 0; j < n; ++j) {if(i == 0 && j == 0) { paths[0][0] = 1; }else{ paths[i][j]= (i==0 ?
Unique Paths 花花酱 LeetCode 2257. Count Unguarded Cells in the Grid By zxi on May 1, 2022 You are given two integers m and n representing a 0-indexed m x n grid. You are also given two 2D integer arrays guards and walls where guards[i] = [rowi, coli] and walls[j] = [row...