bzoj4002

http://www.lydsy.com/JudgeOnline/problem.php?id=4002

好吧，完全不会做，在考场只能爆零。

膜拜PoPoQQQ大神

#include<cstdio>
#include<cstdlib>
#include<iostream>
#include<fstream>
#include<algorithm>
#include<cstring>
#include<string>
#include<cmath>
#include<queue>
#include<stack>
#include<map>
#include<utility>
#include<set>
#include<bitset>
#include<vector>
#include<functional>
#include<deque>
#include<cctype>
#include<climits>
#include<complex>
//#include<bits/stdc++.h>适用于CF,UOJ，但不适用于poj
 
using namespace std;
 
typedef unsigned long long ULL;
typedef long long LL;
typedef double DB;
typedef pair<int,int> PII;
typedef complex<DB> CP;
 
#define mmst(a,v) memset(a,v,sizeof(a))
#define mmcy(a,b) memcpy(a,b,sizeof(a))
#define fill(a,l,r,v) fill(a+l,a+r+1,v)
#define re(i,a,b)  for(i=(a);i<=(b);i++)
#define red(i,a,b) for(i=(a);i>=(b);i--)
#define ire(i,x) for(typedef(x.begin()) i=x.begin();i!=x.end();i++)
#define fi first
#define se second
#define m_p(a,b) make_pair(a,b)
#define SF scanf
#define PF printf
#define two(k) (1<<(k))
 
template<class T>inline T sqr(T x){return x*x;}
template<class T>inline void upmin(T &t,T tmp){if(t>tmp)t=tmp;}
template<class T>inline void upmax(T &t,T tmp){if(t<tmp)t=tmp;}
 
const DB EPS=1e-;
inline int sgn(DB x){if(abs(x)<EPS)return ;return(x>)?:-;}
const DB Pi=acos(-1.0);
 
inline int gint()
  {
        int res=;bool neg=;char z;
        for(z=getchar();z!=EOF && z!='-' && !isdigit(z);z=getchar());
        if(z==EOF)return ;
        if(z=='-'){neg=;z=getchar();}
        for(;z!=EOF && isdigit(z);res=res*+z-'',z=getchar());
        return (neg)?-res:res;
    }
inline LL gll()
  {
      LL res=;bool neg=;char z;
        for(z=getchar();z!=EOF && z!='-' && !isdigit(z);z=getchar());
        if(z==EOF)return ;
        if(z=='-'){neg=;z=getchar();}
        for(;z!=EOF && isdigit(z);res=res*+z-'',z=getchar());
        return (neg)?-res:res;
    }
 
const ULL Mod=;
 
ULL b,d,n;
ULL res;
 
inline ULL cheng(ULL a,ULL b)
  {
      ULL res=;
      for(;b!=;b>>=){if(b&)res=(res+a)%Mod;a=(a<<)%Mod;}
      return res;
  }
 
struct Tmatrix
  {
      int n,m;
      ULL v[][];
      inline void clear(){n=m=;mmst(v,);}
      inline friend Tmatrix operator *(Tmatrix a,Tmatrix b)
        {
            Tmatrix c;c.clear();
            int i,j,k;
            c.n=a.n;c.m=b.m;
            re(i,,c.n)
                  re(j,,c.m)
                      re(k,,a.m)
                          c.v[i][j]=(c.v[i][j]+cheng(a.v[i][k],b.v[k][j]))%Mod;
                return c;
        }
  };
 
inline Tmatrix power(Tmatrix a,ULL k)
  {
      Tmatrix x;x.clear();
        x.n=x.m=;
        x.v[][]=x.v[][]=;
        while(k){if(k&)x=x*a;a=a*a;k>>=;}
        return x;
  }
 
Tmatrix A;
 
int main()
  {
      freopen("bzoj4002.in","r",stdin);
      freopen("bzoj4002.out","w",stdout);
      b=gll();d=gll();n=gll();
      if(n==)
        cout<<""<<endl;
      else
        {
            A.clear();
            A.n=A.m=;
            A.v[][]=b;A.v[][]=(d-b*b)/;
            A.v[][]=;A.v[][]=;
            A=power(A,n-);
            res=(cheng(A.v[][],b)+cheng(A.v[][],))%Mod;
                if(b*b!=d && !(n&))res--;
                res=(res%Mod+Mod)%Mod;
                cout<<res<<endl;
        }
      return ;
  }