2015年5月3日
【leetcode】Number of Islands（middle）
摘要： Given a 2d grid map of'1's (land) and'0's (water), count the number of islands. An island is surrounded by water and is formed by connecting adjacent ... 阅读全文
posted @ 2015-05-03 22:10 匡子语 阅读(195) 评论(0) 推荐(0)
【leetcode】Surrounded Regions（middle）☆
摘要： Given a 2D board containing'X'and'O', capture all regions surrounded by'X'.A region is captured by flipping all'O's into'X's in that surrounded region... 阅读全文
posted @ 2015-05-03 21:37 匡子语 阅读(244) 评论(0) 推荐(0)
【leetcode】Evaluate Reverse Polish Notation（middle）
摘要： Evaluate the value of an arithmetic expression inReverse Polish Notation.Valid operators are+,-,*,/. Each operand may be an integer or another express... 阅读全文
posted @ 2015-05-03 19:49 匡子语 阅读(259) 评论(0) 推荐(0)