思路:找规律发现这个数是斐波那契第2*k+3项-1,数据较大矩阵快速幂搞定.   快速幂入门第一题QAQ #include <stdio.h> #include <stdlib.h> #include <cmath> #include <string.h> #include <iostream> #include <algorithm> #include <queue> #include <vector> #i…

hdu 6197 题意:给定一个数组,问删掉k个字符后数组是否能不减或者不增,满足要求则是magic array,否则不是. 题解:队友想的思路,感觉非常棒!既然删掉k个后不增或者不减,那么就先求数组的最长不下降子序列的长度l1和最长不上升子序列的长度l2,若l1>=n-k||l2>=n-k,则满足要求. #include<iostream> #include<cstdio> #include<cstring> #include<algorithm&g…

transaction transaction transaction Time Limit: 4000/2000 MS (Java/Others)    Memory Limit: 132768/132768 K (Java/Others)Total Submission(s): 1496    Accepted Submission(s): 723 Problem Description Kelukin is a businessman. Every day, he travels arou…

HDU 6197 array array array 题意 输入n和k,表示输入n个整数和可以擦除的次数k,如果至多擦除k次能是的数组中的序列是不上升或者是不下降序列,就是魔力数组,否则不是. 解题思路 分别求最长不下降和不上升子序列的长度,看不符合要求的数字和k的大小. 这里使用优化后的求解最长不上升和不下降子序列的算法. #include <cstdio> #include <algorithm> using namespace std; ; ; int A[maxn], B[…

Problem Description We define a sequence F: ⋅ F0=0,F1=1;⋅ Fn=Fn−1+Fn−2 (n≥2). Give you an integer k, if a positive number n can be expressed byn=Fa1+Fa2+...+Fak where 0≤a1≤a2≤⋯≤ak, this positive number is mjf−good. Otherwise, this positive number is …

题目链接 emmmm...思路是群里群巨聊天讲这题是用尺取法.....emmm然后就没难度了,不过时间上3000多,有点.....盗了个低配本的读入挂发现就降到2800左右, 翻了下,发现神犇Claris280MS秒过.......%%% #include <stdio.h> #include <stdlib.h> #include <cmath> #include <string.h> #include <iostream> #include…

Brute Force Sorting Time Limit: 1 Sec  Memory Limit: 128 MB 题目连接 http://acm.hdu.edu.cn/showproblem.php?pid=6215 Description Beerus needs to sort an array of N integers. Algorithms are not Beerus's strength. Destruction is what he excels. He can destr…

2017-09-15 21:05:41 writer:pprp 给出一个序列问能否去掉k的数之后使得整个序列不是递增也不是递减的 先求出LIS,然后倒序求出最长递减子序列长度,然后判断去k的数后长度是否都大于所求长度 代码如下: #include <bits/stdc++.h> using namespace std; ],tmp1[],arr2[], tmp2[]; int len1,len2; int main() { int cas; // cin >> cas; scanf…

题意:看后面也应该知道是什么意思了 解法: 我们设置l,r,符合条件就是l=起始点,r=当前点,不符合l=i+1 学习了一下FASTIO #include <iostream> #include <algorithm> #include <set> #include <string> #include <vector> #include <queue> #include <map> #include <stack&g…

Problem Description Kelukin is a businessman. Every day, he travels around cities to do some business. On August 17th, in memory of a great man, citizens will read a book named "the Man Who Changed China". Of course, Kelukin wouldn't miss this c…