摘要：Description Alice and Bob take turns playing a game, with Alice starting first. Initially, there is a number on the chalkboard. On each player's turn, 阅读全文

摘要：Description Given a $m \times n$ grid filled with non negative numbers, find a path from top left to bottom right which minimizes the sum of all numbe 阅读全文

摘要：Description 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 ri 阅读全文