题目链接:hdu 5587 前两周 bc 上的题了,因为赶大作业所以没有去打,看了下官方给出的思路,感觉好强大~~竟然能转化成求二进制数 1 的个数: 然后数位 dp 就行了, #include<cstdio> #include<cstring> #include<algorithm> using namespace std; typedef unsigned long long ull; #define For(i,s,t) for(int i = s; i <…
Array Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 131072/131072 K (Java/Others)Total Submission(s): 417 Accepted Submission(s): 211 Problem Description Vicky is a magician who loves math. She has great power in copying and creating.One…
Array Time Limit: 20 Sec Memory Limit: 256 MB 题目连接 http://acm.hdu.edu.cn/showproblem.php?pid=5587 Description Vicky is a magician who loves math. She has great power in copying and creating.One day she gets an array {1}. After that, every day she cop…
Array Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 131072/131072 K (Java/Others) Problem Description Vicky is a magician who loves math. She has great power in copying and creating.One day she gets an array {1}. After that, every day she c…
array array array Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 459 Accepted Submission(s): 282 Problem Description One day, Kaitou Kiddo had stolen a priceless diamond ring. But detective…
Number Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 2159 Accepted Submission(s): 614 Problem Description Here are two numbers A and B (0 < A <= B). If B cannot be divisible by A, and A an…
题意:对于一个序列,要求去掉正好K个数字,若能使其成为不上升子序列或不下降子序列,则“A is a magic array.”,否则"A is not a magic array.\n". 分析: 1.求一遍LCS,然后在将序列逆转,求一遍LCS,分别可得最长上升子序列和最长下降子序列的长度tmp1.tmp2. 2.n - tmp1 <= k或n - tmp2 <= k即可,需要去掉的去完之后,在已经是最长上升或最长下降的序列中随便去够k个就好了. #include<…
Problem Description You are given an array a1,a2,...,an(∀i∈[1,n],1≤ai≤n). Initially, each element of the array is **unique**.Moreover, there are m instructions.Each instruction is in one of the following two formats:1. (1,pos),indicating to change th…
Problem Description A number sequence is defined as follows: f(1) = 1, f(2) = 1, f(n) = (A * f(n - 1) + B * f(n - 2)) mod 7. Given A, B, and n, you are to calculate the value of f(n). Input The input consists of multiple test cases. Each test case…