結果

問題 No.2374 ASKT Subsequences
ユーザー eQeeQe
提出日時 2024-12-28 02:58:20
言語 C++23
(gcc 13.3.0 + boost 1.87.0)
結果
AC  
実行時間 95 ms / 2,000 ms
コード長 5,695 bytes
コンパイル時間 6,249 ms
コンパイル使用メモリ 329,084 KB
実行使用メモリ 6,820 KB
最終ジャッジ日時 2024-12-28 02:58:29
合計ジャッジ時間 7,988 ms
ジャッジサーバーID
(参考情報)
judge5 / judge3
このコードへのチャレンジ
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テストケース

テストケース表示
入力 結果 実行時間
実行使用メモリ
testcase_00 AC 2 ms
6,816 KB
testcase_01 AC 2 ms
6,816 KB
testcase_02 AC 2 ms
6,820 KB
testcase_03 AC 2 ms
6,816 KB
testcase_04 AC 2 ms
6,816 KB
testcase_05 AC 2 ms
6,816 KB
testcase_06 AC 2 ms
6,816 KB
testcase_07 AC 2 ms
6,816 KB
testcase_08 AC 2 ms
6,820 KB
testcase_09 AC 2 ms
6,816 KB
testcase_10 AC 2 ms
6,820 KB
testcase_11 AC 3 ms
6,816 KB
testcase_12 AC 2 ms
6,820 KB
testcase_13 AC 2 ms
6,816 KB
testcase_14 AC 4 ms
6,816 KB
testcase_15 AC 7 ms
6,820 KB
testcase_16 AC 3 ms
6,816 KB
testcase_17 AC 9 ms
6,820 KB
testcase_18 AC 23 ms
6,820 KB
testcase_19 AC 20 ms
6,820 KB
testcase_20 AC 35 ms
6,816 KB
testcase_21 AC 48 ms
6,816 KB
testcase_22 AC 30 ms
6,816 KB
testcase_23 AC 23 ms
6,820 KB
testcase_24 AC 23 ms
6,816 KB
testcase_25 AC 5 ms
6,816 KB
testcase_26 AC 95 ms
6,816 KB
testcase_27 AC 22 ms
6,820 KB
testcase_28 AC 45 ms
6,820 KB
testcase_29 AC 4 ms
6,820 KB
testcase_30 AC 30 ms
6,816 KB
権限があれば一括ダウンロードができます

ソースコード

diff #

#include<bits/stdc++.h>
#include<atcoder/all>
using namespace std;
namespace my{
#define eb emplace_back
#define LL(...) ll __VA_ARGS__;lin(__VA_ARGS__)
#define VL(n,...) vec<ll>__VA_ARGS__;setsize({n},__VA_ARGS__);lin(__VA_ARGS__)
#define FO(n) for(ll ij=n;ij-->0;)
#define FOR(i,...) for(auto[i,i##stop,i##step]=range(0,__VA_ARGS__);i<i##stop;i+=i##step)
#define fo(i,...) FO##__VA_OPT__(R)(i __VA_OPT__(,__VA_ARGS__))
#define of(i,...) for(auto[i,i##stop,i##step]=range(1,__VA_ARGS__);i>=i##stop;i-=i##step)
#define fe(a,i,...) for(auto&&__VA_OPT__([)i __VA_OPT__(,__VA_ARGS__]):a)
#define single_testcase void solve();}int main(){my::io();my::solve();}namespace my{
void io(){cin.tie(nullptr)->sync_with_stdio(0);cout<<fixed<<setprecision(15);}
using ll=long long;
constexpr auto range(bool s,auto...a){array<ll,3>r{0,0,1};ll I=0;((r[I++]=a),...);if(!s&&I==1)swap(r[0],r[1]);r[0]-=s;return r;}
constexpr char newline=10;
constexpr char space=32;
constexpr ll width2(auto x){x|=1;ll r=0;while(x>0)x>>=1,++r;return r;}
constexpr ll log2_floor(auto x){return width2(x)-1;}
auto max(const auto&...a){return max(initializer_list<common_type_t<decltype(a)...>>{a...});}

template<class A,class B>struct pair{
  A a;B b;
  pair()=default;
  pair(A a,B b):a(a),b(b){}
  pair(const std::pair<A,B>&p):a(p.first),b(p.second){}
  auto operator<=>(const pair&)const=default;
  pair operator+(const pair&p)const{return{a+p.a,b+p.b};}
  friend ostream&operator<<(ostream&o,const pair&p){return o<<p.a<<space<<p.b;}
};

template<class T,class U>ostream&operator<<(ostream&o,const std::pair<T,U>&p){return o<<p.first<<space<<p.second;}
template<class T,size_t n>ostream&operator<<(ostream&o,const array<T,n>&a){fo(i,n)o<<a[i]<<string(i!=n-1,space);return o;}

template<class V>concept vectorial=is_base_of_v<vector<typename V::value_type>,V>;
template<class T>struct vec_attr{using core_type=T;static constexpr int d=0;};
template<vectorial V>struct vec_attr<V>{using core_type=typename vec_attr<typename V::value_type>::core_type;static constexpr int d=vec_attr<typename V::value_type>::d+1;};
template<class T>using core_t=vec_attr<T>::core_type;
template<class V>istream&operator>>(istream&i,vector<V>&v){fe(v,e)i>>e;return i;}
template<class V>ostream&operator<<(ostream&o,const vector<V>&v){fe(v,e)o<<e<<string(&e!=&v.back(),vectorial<V>?newline:space);return o;}

template<class V>struct vec:vector<V>{
  using vector<V>::vector;
  vec(const vector<V>&v){vector<V>::operator=(v);}

  vec&operator^=(const vec&u){this->insert(this->end(),u.begin(),u.end());return*this;}
  vec operator^(const vec&u)const{return vec{*this}^=u;}
  vec&operator+=(const vec&u){vec&v=*this;fo(i,v.size())v[i]+=u[i];return v;}
  vec&operator-=(const vec&u){vec&v=*this;fo(i,v.size())v[i]-=u[i];return v;}
  vec operator+(const vec&u)const{return vec{*this}+=u;}
  vec operator-(const vec&u)const{return vec{*this}-=u;}
  vec&operator++(){fe(*this,e)++e;return*this;}
  vec&operator--(){fe(*this,e)--e;return*this;}
  vec operator-()const{vec v=*this;fe(v,e)e=-e;return v;}

  auto scan(const auto&f)const{pair<core_t<V>,bool>r{};fe(*this,e)if constexpr(!vectorial<V>)r.b?f(r.a,e),r:r={e,1};else if(auto s=e.scan(f);s.b)r.b?f(r.a,s.a),r:r=s;return r;}
  auto max()const{return scan([](auto&a,const auto&b){a<b?a=b:0;}).a;}
  vec zeta()const{vec v=*this;if constexpr(vectorial<V>)fe(v,e)e=e.zeta();fo(i,v.size()-1)v[i+1]+=v[i];return v;}
};
template<class T=ll,size_t n,size_t i=0>auto make_vec(const ll(&s)[n],T x={}){if constexpr(n==i+1)return vec<T>(s[i],x);else{auto X=make_vec<T,n,i+1>(s,x);return vec<decltype(X)>(s[i],X);}}
template<ll n,class...A>void setsize(const ll(&l)[n],A&...a){((a=make_vec(l,core_t<A>())),...);}

void lin(auto&...a){(cin>>...>>a);}
template<char c=space>void pp(const auto&...a){ll n=sizeof...(a);((cout<<a<<string(--n>0,c)),...);cout<<newline;}

struct bit_vector:vec<uint8_t>{
  bit_vector(){}
  bit_vector(ll n){
    this->resize(n);
    fo(i,2){
      cnt[i].resize(n);
      se[i].reserve(n);
    }
  }
  void build(){
    fo(i,this->size())cnt[(*this)[i]][i]++,se[(*this)[i]].eb(i);
    fo(f,2)cnt[f]=cnt[f].zeta();
  }
  inline ll count(ll l,ll r,bool f)const{return count(r,f)-count(l,f);}
  inline ll count(ll r,bool f)const{return r<=0?0:cnt[f][r-1];}

private:
  array<vec<int>,2>cnt,se;
};

struct wavelet_matrix{
  ll n,A,log;
  vec<bit_vector>bv;
  vec<ll>left;
  wavelet_matrix(vec<ll>a){
    n=a.size(),log=log2_floor(a.max())+1,A=(1LL<<log);
    vec<ll>cu=a;
    of(h,log){
      bit_vector b(n);
      fo(i,n)b[i]=(cu[i]>>h&1);
      b.build(),bv.eb(b);

      vec<ll>pre,suf;
      fo(i,n)!b[i]?pre.eb(cu[i]):suf.eb(cu[i]);
      cu=pre^suf;
    }
    left.resize(A,n);
    of(i,n)left[cu[i]]=i;
  }

  inline ll operator[](ll i)const{return get(i);}
  ll get(ll i)const{
    assert(0<=i&&i<n);
    ll x=0,cu=i;
    fo(h,log){
      bool f=bv[h][cu];
      x=(x<<1)+f;
      cu=bv[h].count(cu+1,f)-1;
      if(f)cu+=bv[h].count(n,0);
    }
    return x;
  }

  ll count(ll l,ll r,ll x)const{return count(r,x)-count(l,x);}
  ll count(ll r,ll x)const{
    assert(r<=n);
    if(r<=0)return 0;
    if(x<0||x>=A)return 0;
    if(left[x]==n)return 0;

    ll cu=r-1;
    fo(h,log){
      bool f=(x>>(log-1-h)&1);
      cu=bv[h].count(cu+1,f)-1;
      if(f)cu+=bv[h].count(n,0);
    }
    return cu-left[x]+1;
  }

  friend ostream&operator<<(ostream&o,const wavelet_matrix&wv){fo(i,wv.n)o<<wv[i]<<string(i<wv.n-1,space);return o;}
};

single_testcase
void solve(){
  LL(N);
  VL(N,a);

  wavelet_matrix wm(a);

  ll ans=0;
  fo(i,1,N-1){
    fo(j,i+1,N){
      ll k=a[i]-a[j];
      if(k<=0)continue;
      ans+=wm.count(0,i,a[j]-10)*wm.count(j,N,a[i]+1);
    }
  }
  pp(ans);
}}
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