今天下午刚起来眼睛就比較涨,,并且还有点恶心,唉.结果一直不在状态.并且这个题太坑了.. .. 点击此处即可传送 Hit 2255 Maybe ACMers of HIT are always fond of fibonacci numbers, because it is so beautiful. Don't you think so? At the same time, fishcanfly always likes to change and this time he thinks ab…
#include <iostream> #include <cstdio> #include <cstring> using namespace std; const int mod=10000000; struct mat { long long t[3][3]; void set() { memset(t,0,sizeof(t)); } } a,b; mat multiple(mat a,mat b,int n,int p) { int i,j,k; mat tem…
Maybe ACMers of HIT are always fond of fibonacci numbers, because it is so beautiful. Don't you think so? At the same time,fishcanfly always likes to change and this time he thinks about the following series of numbers which you can guess is derived…
Difficulty: Easy Topic: Fibonacci seqs Write a function which returns the first X fibonacci numbers. ;; 首先实现一个求fibonacci数的函数 ;;最简单的实现,就是通过定义来实现递归函数,(如下的fibonacci-number),但是这样缺点很明显,首先这不算尾递归,代码里面有大量的重复计算.其次,jvm不支持尾调用优化,因此,即使是尾递归,当嵌套层侧过深时,也会出现stackoverf…
经典的Fibonacci数的问题 主要想展示一下迭代与递归,以及尾递归的三种写法,以及他们各自的时间性能. public class Fibonacci { /*迭代*/ public static int process_loop(int n) { if (n == 0 || n == 1) { return 1; } int a = 1, b = 1; int i = 1; while (i < n) { i++; int t = b; b = a + t; a = t; } return…
Tree Recovery Time Limit: 1000MS Memory Limit: 65536K Total Submissions: 11939 Accepted: 7493 Description Little Valentine liked playing with binary trees very much. Her favorite game was constructing randomly looking binary trees with capital le…
Design a hit counter which counts the number of hits received in the past 5 minutes. Each function accepts a timestamp parameter (in seconds granularity) and you may assume that calls are being made to the system in chronological order (ie, the times…