表结构是这样的 部门 上级部门 A BB CC DA AB BC C 求一条SQL语句,根据A查其上级部门,查询结果为上级部门BCD ================================================= 用函数create table tb (部门 varchar(20),上级部门 varchar(20)) insert into tb
You are climbing a stair case. It takes n steps to reach to the top. Each time you can either climb 1 or 2 steps. In how many distinct ways can you climb to the top? 思路: 最简单的DP问题:递归+查表 代码: int climbStairs(int n) { vector<, -);//忘了在memo[0]没有意义的时候,数组初始