思路: dp[i][j]表示到第i个砖块为止共计有j个砖块和它左边的砖块颜色不同. 实现: #include <bits/stdc++.h> using namespace std; typedef long long ll; ; ll dp[][]; int main() { int n, m, k; while (cin >> n >> m >> k) { memset(dp, , sizeof dp); dp[][] = m; ; i <= n;…
传送门:http://codeforces.com/contest/1081/problem/C C. Colorful Bricks time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output On his free time, Chouti likes doing some housework. He has got one new…
学习sql中的排列组合,在园子里搜着看,看到篇文章,于是自己(新手)用了最最原始的sql去写出来: --需求----B, C, F, M and S住在一座房子的不同楼层.--B 不住顶层.C 不住底层.--F 既不住顶层也不住底层.M 住得比 C 高.--S 住的楼层和 F 不相邻.--F 住的楼层和 C 不相邻. create table pailie (rnam varchar(20) ) select 'B' as rnam into #y union select 'C' union…
一般用dfs来做 最简单的一种: 17. Letter Combinations of a Phone Number Given a digit string, return all possible letter combinations that the number could represent. A mapping of digit to letters (just like on the telephone buttons) is given below. Input:Digit s…