結果
| 問題 |
No.980 Fibonacci Convolution Hard
|
| ユーザー |
beet
|
| 提出日時 | 2020-02-09 17:19:24 |
| 言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
AC
|
| 実行時間 | 97 ms / 2,000 ms |
| コード長 | 3,901 bytes |
| コンパイル時間 | 2,198 ms |
| コンパイル使用メモリ | 203,796 KB |
| 最終ジャッジ日時 | 2025-01-08 23:21:33 |
|
ジャッジサーバーID (参考情報) |
judge5 / judge2 |
(要ログイン)
| ファイルパターン | 結果 |
|---|---|
| other | AC * 17 |
ソースコード
#ifndef call_from_test
#include<bits/stdc++.h>
using namespace std;
#endif
//BEGIN CUT HERE
// construct a charasteristic equation from sequence
template<typename T>
vector<T> berlekamp_massey(vector<T> &as){
using Poly = vector<T>;
int n=as.size();
Poly bs({-T(1)}),cs({-T(1)});
T y(1);
for(int ed=1;ed<=n;ed++){
int l=cs.size(),m=bs.size();
T x(0);
for(int i=0;i<l;i++) x+=cs[i]*as[ed-l+i];
bs.emplace_back(0);
m++;
if(x==T(0)) continue;
T freq=x/y;
if(m<=l){
for(int i=0;i<m;i++)
cs[l-1-i]-=freq*bs[m-1-i];
continue;
}
auto ts=cs;
cs.insert(cs.begin(),m-l,T(0));
for(int i=0;i<m;i++) cs[m-1-i]-=freq*bs[m-1-i];
bs=ts;
y=x;
}
return cs;
}
//END CUT HERE
#ifndef call_from_test
#define call_from_test
#ifndef call_from_test
#include<bits/stdc++.h>
using namespace std;
#endif
//BEGIN CUT HERE
template<typename T,T MOD = 1000000007>
struct Mint{
static constexpr T mod = MOD;
T v;
Mint():v(0){}
Mint(signed v):v(v){}
Mint(long long t){v=t%MOD;if(v<0) v+=MOD;}
Mint pow(long long k){
Mint res(1),tmp(v);
while(k){
if(k&1) res*=tmp;
tmp*=tmp;
k>>=1;
}
return res;
}
static Mint add_identity(){return Mint(0);}
static Mint mul_identity(){return Mint(1);}
Mint inv(){return pow(MOD-2);}
Mint& operator+=(Mint a){v+=a.v;if(v>=MOD)v-=MOD;return *this;}
Mint& operator-=(Mint a){v+=MOD-a.v;if(v>=MOD)v-=MOD;return *this;}
Mint& operator*=(Mint a){v=1LL*v*a.v%MOD;return *this;}
Mint& operator/=(Mint a){return (*this)*=a.inv();}
Mint operator+(Mint a) const{return Mint(v)+=a;}
Mint operator-(Mint a) const{return Mint(v)-=a;}
Mint operator*(Mint a) const{return Mint(v)*=a;}
Mint operator/(Mint a) const{return Mint(v)/=a;}
Mint operator-() const{return v?Mint(MOD-v):Mint(v);}
bool operator==(const Mint a)const{return v==a.v;}
bool operator!=(const Mint a)const{return v!=a.v;}
bool operator <(const Mint a)const{return v <a.v;}
static Mint comb(long long n,int k){
Mint num(1),dom(1);
for(int i=0;i<k;i++){
num*=Mint(n-i);
dom*=Mint(i+1);
}
return num/dom;
}
};
template<typename T,T MOD> constexpr T Mint<T, MOD>::mod;
template<typename T,T MOD>
ostream& operator<<(ostream &os,Mint<T, MOD> m){os<<m.v;return os;}
//END CUT HERE
#ifndef call_from_test
//INSERT ABOVE HERE
signed ABC127_E(){
cin.tie(0);
ios::sync_with_stdio(0);
int h,w,k;
cin>>h>>w>>k;
using M = Mint<int>;
M ans{0};
for(int d=1;d<h;d++)
ans+=M(d)*M(h-d)*M(w)*M(w);
for(int d=1;d<w;d++)
ans+=M(d)*M(w-d)*M(h)*M(h);
ans*=M::comb(h*w-2,k-2);
cout<<ans<<endl;
return 0;
}
/*
verified on 2019/06/12
https://atcoder.jp/contests/abc127/tasks/abc127_e
*/
signed main(){
//ABC127_E();
return 0;
}
#endif
#ifndef call_from_test
#include<bits/stdc++.h>
using namespace std;
#endif
//BEGIN CUT HERE
struct FastIO{
FastIO(){
cin.tie(0);
ios::sync_with_stdio(0);
}
}fastio_beet;
//END CUT HERE
#ifndef call_from_test
signed main(){
return 0;
}
#endif
#undef call_from_test
signed YUKI_980(){
using M = Mint<int>;
int p;
cin>>p;
const int n = 100;
vector<M> as(n);
as[0]=M(0);
as[1]=M(0);
as[2]=M(1);
for(int i=3;i<n;i++) as[i]=M(p)*as[i-1]+as[i-2];
vector<M> bs(n,M(0));
for(int s=0;s<n;s++)
for(int t=0;s+t<n;t++)
bs[s+t]+=as[s]*as[t];
auto cs=berlekamp_massey(bs);
for(auto &c:cs) c/=cs.back();
reverse(cs.begin(),cs.end());
const int MAX = 2e6 + 100;
vector<M> dp(MAX,0);
for(int i=0;i<n;i++) dp[i]=bs[i];
for(int i=n;i<MAX;i++)
for(int j=0;j<(int)cs.size();j++)
dp[i]-=dp[i-j]*cs[j];
int q;
cin>>q;
for(int i=0;i<q;i++){
int k;
cin>>k;
cout<<dp[k]<<"\n";
}
return 0;
}
/*
verified on 2020/02/09
https://yukicoder.me/problems/no/980
*/
signed main(){
YUKI_980();
return 0;
}
#endif
beet