D Multiples and Power Differences (构造) 题目大意:给一个n*m的矩阵a,a[i][j]在1到16之间.现在要构造矩阵b,需要满足如下条件: 1.b[i][j]在1到1e6之间 2.b[i][j]是a[i][j]的倍数 3.对于矩阵中任意相邻的两个数,要求存在正整数k,他们的差值绝对值等于k的四次方,不要求所有对的k都相同 构造神仙题,乍一看不可做.. 考虑第二个条件,由于a最多到16,发现1到16所有数的最小公倍数是$720720$!小于1e6. 在考虑第三…

由于今天实在是太自闭了就前来写场已经 AK 的 div.2 的题解了 这场比赛是我的 div.2 首 AK 哦 A 先特判 \(b=1\),强制将 \(b+1\) 否则容易发现答案最大为 \(\log_ab\),所以直接枚举 \(b\) 加了多少次,枚举到 \(30\) 就行了. B 考虑一个数组 \([a_1,a_2,\dots,a_n]\) 有多少个与其 \(k\)-similar 的数组. 对于 \(2\leq i\leq n-1\),如果我们替换 \(a_i\) 为 \(x\),那么必须…

Codeforces Round #366 (Div. 2) A I hate that I love that I hate it水题 #I hate that I love that I hate it n = int(raw_input()) s = "" a = ["I hate that ","I love that ", "I hate it","I love it"] for i in ran…

Codeforces Round #354 (Div. 2) Problems     # Name     A Nicholas and Permutation standard input/output 1 s, 256 MB    x3384 B Pyramid of Glasses standard input/output 1 s, 256 MB    x1462 C Vasya and String standard input/output 1 s, 256 MB    x1393…

直达–>Codeforces Round #368 (Div. 2) A Brain’s Photos 给你一个NxM的矩阵,一个字母代表一种颜色,如果有”C”,”M”,”Y”三种中任意一种就输出”#Color”,如果只有”G”,”B”,”W”就输出”#Black&White”. #include <cstdio> #include <cstring> using namespace std; const int maxn = 200; const int INF =…

 cf之路,1,Codeforces Round #345 (Div. 2) ps:昨天第一次参加cf比赛,比赛之前为了熟悉下cf比赛题目的难度.所以做了round#345连试试水的深浅.....       其实这个应该是昨天就写完的,不过没时间了,就留到了今天.. 地址:http://codeforces.com/contest/651/problem/A A. Joysticks time limit per test 1 second memory limit per test 256…

Codeforces Round #279 (Div. 2) 做得我都变绿了! Problems     # Name     A Team Olympiad standard input/output 1 s, 256 MB  x2377 B Queue standard input/output 2 s, 256 MB  x1250 C Hacking Cypher standard input/output 1 s, 256 MB  x740 D Chocolate standard in…

Codeforces Round #262 (Div. 2) 1003 C. Present time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output Little beaver is a beginner programmer, so informatics is his favorite subject. Soon his info…

Codeforces Round #262 (Div. 2) 1004 D. Little Victor and Set time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output Little Victor adores the sets theory. Let us remind you that a set is a group of…

题意: 思路: Codeforces Round #370(Solved: 4 out of 5) A - Memory and Crow 题意:有一个序列,然后对每一个进行ai = bi - bi + 1 + bi + 2 - bi + 3.... 的操作,最后得到了a 序列,给定 a 序列,求原序列. 思路:水. #include <set> #include <map> #include <stack> #include <queue> #includ…