#730922 (C++17) No.1811 EQUIV Ten

• 問題: No.1811 EQUIV Ten
• ユーザー: ytqm3
• 提出日時: 2022-01-14 22:35:05
• 言語: C++17 (gcc 13.3.0 + boost 1.87.0)
• 結果: AC
• 実行時間: 52 ms / 2,000 ms
• コード長: 2,468 bytes
• コンパイル時間: 2,179 ms
• コンパイル使用メモリ: 199,072 KB
• 最終ジャッジ日時: 2025-01-27 11:51:28
• ジャッジサーバーID （参考情報）: judge5 / judge2

ファイルパターン	結果
sample	AC * 3
other	AC * 33

ソースコード

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#include<bits/stdc++.h>
typedef uint64_t u64;
typedef int64_t i64;
using namespace std;
template<typename T> void scan_(vector<T>& a){
  for(auto& v:a){
    cin>>v;
  }
}
template<typename T> void scan_(T& a){
  cin>>a;
}
void scan(){}
template<typename T,class... Args> void scan(T& n,Args&... args){
  scan_(n),scan(args...);
}
template<typename T> void println(T n){
  cout<<n<<"\n";
}
template<typename T,class... Args> void println(T n,Args... args){
  cout<<n<<" ",println(args...);
}
template<typename T> void println(vector<T> v){
  for(size_t i=0;i<v.size();++i){
    cout<<v[i]<<" \n"[i==v.size()-1];
  }
}
template<u64 mod> struct modint{
  u64 val;
  modint(i64 val_=0):val((val_%i64(mod)+i64(mod))%i64(mod)){}
  modint operator-(){
    return (val==0)?0:mod-val;
  }
  modint operator+(modint rhs){
    return modint(*this)+=rhs;
  }
  modint operator-(modint rhs){
    return modint(*this)-=rhs;
  }
  modint operator*(modint rhs){
    return modint(*this)*=rhs;
  }
  modint operator/(modint rhs){
    return modint(*this)/=rhs;
  }
  modint operator^(i64 rhs){
    return modint(*this)^=rhs;
  }
  modint &operator+=(modint rhs){
    val+=rhs.val,val-=((val>=mod)?mod:0);
    return (*this);
  }
  modint &operator-=(modint rhs){
    val+=((val<rhs.val)?mod:0),val-=rhs.val;
    return (*this);
  }
  modint &operator*=(modint rhs){
    val=val*rhs.val%mod;
    return (*this);
  }
  modint &operator/=(modint rhs){
    return (*this)*=rhs^(mod-2);
  }
  modint &operator^=(i64 rhs){
    modint res=1,now=(*this);
    while(rhs){
      res*=((rhs&1)?now:1),now*=now,rhs>>=1;
    }
    return (*this)=res;
  }
  bool operator==(modint rhs){
    return val==rhs.val;
  }
  bool operator!=(modint rhs){
    return val!=rhs.val;
  }
  friend std::ostream &operator<<(std::ostream& os,modint x){
    return os<<(x.val);
  }
  friend std::istream &operator>>(std::istream& is,modint& x){
    u64 t;
    is>>t,x=t;
    return is;
  }
};
int main(){
  constexpr u64 mod=1000000007;
  typedef modint<mod> mint;
  int N;
  scan(N);
  if(N<4){
    println(0);
    return 0;
  }
  vector<vector<mint>> dp(N+1,vector<mint> (16));
  for(int j=0;j<16;++j){
    dp[4][j]=1;
  }
  for(int i=4;i<N;++i){
    for(int j=0;j<16;++j){
      if(j==10){
        continue;
      }
      dp[i+1][(2*j)%16+1]+=dp[i][j];
      dp[i+1][(2*j)%16]+=dp[i][j];
    }
  }
  mint sm=0;
  for(int j=0;j<16;++j){
    if(j!=10){
      sm+=dp[N][j];
    }
  }
  println((mint(2)^N)-sm);
}
 
 
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