HDU.1575 Tr A ( 矩阵快速幂) 点我挑战题目 题意分析 直接求矩阵A^K的结果,然后计算正对角线,即左上到右下对角线的和,结果模9973后输出即可. 由于此题矩阵直接给出的,题目比较裸. 代码总览 #include <iostream> #include <cstdio> #include <algorithm> #include <cstring> #include <sstream> #include <set> #…

斐波那契数列后四位可以用快速幂取模(模10000)算出.前四位要用公式推 HDU 3117 Fibonacci Numbers(矩阵快速幂+公式) f(n)=(((1+√5)/2)^n+((1-√5)/2)^n)/√5 假设F[n]可以表示成 t * 10^k(t是一个小数),那么对于F[n]取对数log10,答案就为log10 t + K,此时很明显log10 t<1,于是我们去除整数部分,就得到了log10 t 再用pow(10,log10 t)我们就还原回了t.将t×1000就得到了F[n…

A Short problem Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 2461    Accepted Submission(s): 864 Problem Description According to a research, VIM users tend to have shorter fingers, compared…

题目 A Simple Math Problem 解析 矩阵快速幂模板题 构造矩阵 \[\begin{bmatrix}a_0&a_1&a_2&a_3&a_4&a_5&a_6&a_7&a_8&a_9\\ 1&0&0&0&0&0&0&0&0&0\\ 0&1&0&0&0&0&0&0&0&0\\ 0&…

题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=5950 Farmer John likes to play mathematics games with his N cows. Recently, they are attracted by recursive sequences. In each turn, the cows would stand in a line, while John writes two positive numbers…

蒟蒻的我还需深入学习 链接:传送门 题意:给出一个长度为 n,n 不超过100的 01 串 s ,每当一个数字左侧为 1 时( 0的左侧是 n-1 ),这个数字就会发生改变,整个串改变一次需要 1s ,询问 M s 后此串变为什么样子,例如 0101111 ,1s 后变为 1111000 思路: 根据题意可以得到这样一个规律 s[ i ] = ( s[ i - 1 ] + s[ i ] ) % 2,特别的 s[ 0 ] = ( s[ n-1 ] + s[ 0 ] ) % 2 ( s[ ] 不再考…

Problem Description Queues and Priority Queues are data structures which are known to most computer scientists. The Queue occurs often in our daily life. There are many people lined up at the lunch time. Now we define that ‘f’ , then they are ff, mm,…

题目传送门:http://acm.hdu.edu.cn/showproblem.php?pid=6470 Count Time Limit: 6000/3000 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others)Total Submission(s): 301    Accepted Submission(s): 127 Problem Description Farmer John有n头奶牛.某天奶牛想要数一数有多少头奶牛…

任意门:http://acm.hdu.edu.cn/showproblem.php?pid=6395 Sequence Time Limit: 4000/2000 MS (Java/Others)    Memory Limit: 262144/262144 K (Java/Others)Total Submission(s): 2564    Accepted Submission(s): 999 Problem Description Let us define a sequence as…

HDU - 1005 Number Sequence 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…