結果
問題 | No.1879 How many matchings? |
ユーザー |
👑 ![]() |
提出日時 | 2022-03-18 21:58:57 |
言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
結果 |
WA
|
実行時間 | - |
コード長 | 2,637 bytes |
コンパイル時間 | 1,899 ms |
コンパイル使用メモリ | 207,828 KB |
最終ジャッジ日時 | 2025-01-28 10:22:11 |
ジャッジサーバーID (参考情報) |
judge4 / judge3 |
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ファイルパターン | 結果 |
---|---|
other | AC * 7 WA * 8 |
ソースコード
#include <bits/stdc++.h>#pragma GCC optimize("Ofast")#define _GLIBCXX_DEBUGusing namespace std;using std::cout;using std::cin;using std::endl;using ll=long long;using ld=long double;ll ILL=1167167167167167167;const int INF=2100000000;const ll mod=1e9+7;#define rep(i,a) for (ll i=0;i<a;i++)#define all(p) p.begin(),p.end()template<class T> using _pq = priority_queue<T, vector<T>, greater<T>>;template<class T> ll LB(vector<T> &v,T a){return lower_bound(v.begin(),v.end(),a)-v.begin();}template<class T> ll UB(vector<T> &v,T a){return upper_bound(v.begin(),v.end(),a)-v.begin();}template<class T> bool chmin(T &a,const T &b){if(a>b){a=b;return 1;}else return 0;}template<class T> bool chmax(T &a,const T &b){if(a<b){a=b;return 1;}else return 0;}template<class T> void So(vector<T> &v) {sort(v.begin(),v.end());}template<class T> void Sore(vector<T> &v) {sort(v.begin(),v.end(),[](T x,T y){return x>y;});}void yneos(bool a){if(a) cout<<"Yes\n"; else cout<<"No\n";}template<class T> void vec_out(vector<T> &p){for(int i=0;i<(int)(p.size());i++){if(i) cout<<" ";cout<<p[i];}cout<<"\n";}template<class T>using square_matrix=std::vector<std::vector<T>>;template<class T,T (*add_op)(T,T),T(*add_e)(),T (*mul_op)(T,T),T(*mul_e)()>square_matrix<T> mul_matrix(square_matrix<T> l,square_matrix<T> r){int n=l.size();assert((int)l[0].size()==n&&(int)r.size()==n&&(int)r[0].size()==n);square_matrix<T> val(n,std::vector<T>(n,add_e()));for(int i=0;i<n;i++) for(int j=0;j<n;j++) for(int k=0;k<n;k++){val[i][k]=add_op(val[i][k],mul_op(l[i][j],r[j][k]));}return val;}template<class T,T (*add_op)(T,T),T(*add_e)(),T (*mul_op)(T,T),T(*mul_e)()>square_matrix<T> pow_matrix(square_matrix<T> l,long long times){int n=l.size();square_matrix<T> val(n,std::vector<T>(n,add_e()));for(int i=0;i<n;i++) val[i][i]=mul_e();while(times){if(times&1){val=mul_matrix<T,add_op,add_e,mul_op,mul_e>(val,l);}l=mul_matrix<T,add_op,add_e,mul_op,mul_e>(l,l);times>>=1;}return val;}using mat_F=ll;mat_F add_op(mat_F a,mat_F b){return (a+b)%mod;}mat_F add_e(){return 0;}mat_F mul_op(mat_F a,mat_F b){return (a*b)%mod;}mat_F mul_e(){return 1;}#define calc mat_F,add_op,add_e,mul_op,mul_evoid solve();// oddloopint main() {ios::sync_with_stdio(false);cin.tie(nullptr);int t=1;//cin>>t;rep(i,t) solve();}void solve(){ll N;cin>>N;vector<vector<ll>> base(8,vector<ll>(8));rep(i,3){base[i][i+1]=1;base[i+4][i+5]=1;}base[0][4]=1;base[1][0]=1;base[3][0]=1;base[2][4]=1;auto ans=pow_matrix<calc>(base,N);cout<<(ans[0][0]+ans[0][4])%mod<<"\n";}