Recurrences Input: standard input Output: standard output Consider recurrent functions of the following form: f(n) = a1 f(n - 1) + a2 f(n - 2) + a3 f(n - 3) + ... + ad f(n - d), for n > d. a1, a2, ..., ad - arbitrary constants. A famous example is th…
Partition Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 2362 Accepted Submission(s): 937 Problem Description Define f(n) as the number of ways to perform n in format of the sum of some posi…
题目链接:uva 10518 - How Many Calls? 公式f(n) = 2 * F(n) - 1, F(n)用矩阵快速幂求. #include <stdio.h> #include <string.h> long long n; int b; struct state { int s[2][2]; state(int a = 0, int b = 0, int c = 0, int d = 0) { s[0][0] = a, s[0][1] = b, s[1][0] =…
Jzzhu has invented a kind of sequences, they meet the following property: You are given x and y, please calculate fn modulo 1000000007 (109 + 7). Input The first line contains two integers x and y (|x|, |y| ≤ 109). The second line contains a single i…
Yet another Number Sequence Let’s define another number sequence, given by the following function:f(0) = af(1) = bf(n) = f(n − 1) + f(n − 2), n > 1When a = 0 and b = 1, this sequence gives the Fibonacci Sequence. Changing the values…
Modular Fibonacci The Fibonacci numbers (0, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, ...) are defined by the recurrence:F0 = 0F1 = 1Fi = Fi−1 + Fi−2 for i > 1Write a program which calculates Mn = Fn mod 2m for given pair of n and…
Covering Bob's school has a big playground, boys and girls always play games here after school. To protect boys and girls from getting hurt when playing happily on the playground, rich boy Bob decided to cover the playground using his carpets. Meanwh…
题目链接 题意: 思路: 直接拿别人的图,自己写太麻烦了~ 然后就可以用矩阵快速幂套模板求递推式啦~ 另外: 这题想不到或者不会矩阵快速幂,根本没法做,还是2013年长沙邀请赛水题,也是2008年Google Codejam Round 1A的C题. #include <bits/stdc++.h> typedef long long ll; const int N = 5; int a, b, n, mod; /* *矩阵快速幂处理线性递推关系f(n)=a1f(n-1)+a2f(n-2)+.…
http://acm.hdu.edu.cn/showproblem.php?pid=4965 2014 Multi-University Training Contest 9 1006 Fast Matrix Calculation Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 131072/131072 K (Java/Others)Total Submission(s): 238 Accepted Submission(…
2014多校第一题,当时几百个人交没人过,我也暴力交了几发,果然不行. 比完了去学习了BSGS才懂! 题目:http://acm.hdu.edu.cn/showproblem.php?pid=4887 Endless Punishment Time Limit: 30000/15000 MS (Java/Others) Memory Limit: 65536/65536 K (Java/Others) Total Submission(s): 52 Accepted Submissi…
How many ways?? Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 954 Accepted Submission(s): 314 Problem Description 春天到了, HDU校园里开满了花, 姹紫嫣红, 非常美丽. 葱头是个爱花的人, 看着校花校草竞相开放, 漫步校园, 心情也变得舒畅. 为了多看看这迷…