博客
关于我
2020牛客寒假算法基础集训营1 J u's的影响力(矩阵快速幂+费小马降幂)
阅读量:400 次
发布时间:2019-03-05

本文共 1492 字,大约阅读时间需要 4 分钟。

用矩阵快速幂计算x,y,a的幂次。

#include
using namespace std;#define ll long longstruct mt{ ll a[3][3];};mt t(mt a,mt b,ll mod){ mt res; int i,j,k; for(i=0;i<3;i++){ for(j=0;j<3;j++){ res.a[i][j]=0; for(k=0;k<3;k++){ res.a[i][j]+=a.a[i][k]*b.a[k][j]%mod; res.a[i][j]%=mod; } } } return res;}mt power(mt a,ll b,ll mod){ mt res; int i,j; for(i=0;i<3;i++){ for(j=0;j<3;j++){ res.a[i][j]=0; } } res.a[0][0]=res.a[1][1]=res.a[2][2]=1; while(b){ if(b&1)res=t(res,a,mod); b>>=1; a=t(a,a,mod); } return res;}ll feb(ll n,ll mod){ mt temp; int i,j; for(i=0;i<3;i++){ for(j=0;j<3;j++){ temp.a[i][j]=0; } } temp.a[0][1]=temp.a[1][1]=temp.a[1][0]=1; mt res=power(temp,n-1,mod); return (res.a[0][0]+res.a[0][1])%mod;}ll feb2(ll n,ll mod){ mt temp; int i,j; for(i=0;i<3;i++){ for(j=0;j<3;j++){ temp.a[i][j]=0; } } temp.a[0][1]=temp.a[1][1]=temp.a[1][0]=temp.a[1][2]=temp.a[2][2]=1; mt res=power(temp,n-1,mod); return (res.a[0][0]+2*res.a[0][1]+res.a[0][2])%mod;}ll power(ll a,ll b,ll mod){ ll res=1; while(b){ if(b&1)res=res*a%mod; b>>=1; a=a*a%mod; } return res;}int main(){ int m=1e9+7; int i,j; ll n,x,y,a,b; cin>>n>>x>>y>>a>>b; if(n==1){ cout<

转载地址:http://uoewz.baihongyu.com/

你可能感兴趣的文章
no connection could be made because the target machine actively refused it.问题解决
查看>>
No Datastore Session bound to thread, and configuration does not allow creation of non-transactional
查看>>
No fallbackFactory instance of type class com.ruoyi---SpringCloud Alibaba_若依微服务框架改造---工作笔记005
查看>>
No Feign Client for loadBalancing defined. Did you forget to include spring-cloud-starter-loadbalanc
查看>>
No mapping found for HTTP request with URI [/...] in DispatcherServlet with name ...的解决方法
查看>>
No mapping found for HTTP request with URI [/logout.do] in DispatcherServlet with name 'springmvc'
查看>>
No module named 'crispy_forms'等使用pycharm开发
查看>>
No module named cv2
查看>>
No module named tensorboard.main在安装tensorboardX的时候遇到的问题
查看>>
No module named ‘MySQLdb‘错误解决No module named ‘MySQLdb‘错误解决
查看>>
No new migrations found. Your system is up-to-date.
查看>>
No qualifying bean of type XXX found for dependency XXX.
查看>>
No qualifying bean of type ‘com.netflix.discovery.AbstractDiscoveryClientOptionalArgs<?>‘ available
查看>>
No resource identifier found for attribute 'srcCompat' in package的解决办法
查看>>
no session found for current thread
查看>>
No toolchains found in the NDK toolchains folder for ABI with prefix: mips64el-linux-android
查看>>
NO.23 ZenTaoPHP目录结构
查看>>
no1
查看>>
NO32 网络层次及OSI7层模型--TCP三次握手四次断开--子网划分
查看>>
NOAA(美国海洋和大气管理局)气象数据获取与POI点数据获取
查看>>