結果

問題 No.1371 交換門松列・松
ユーザー kiyoshi0205kiyoshi0205
提出日時 2021-01-29 23:25:31
言語 C++14
(gcc 12.3.0 + boost 1.83.0)
結果
AC  
実行時間 93 ms / 4,000 ms
コード長 5,866 bytes
コンパイル時間 3,133 ms
コンパイル使用メモリ 208,568 KB
実行使用メモリ 14,400 KB
最終ジャッジ日時 2024-06-27 09:51:46
合計ジャッジ時間 5,436 ms
ジャッジサーバーID
（参考情報） 		judge3 / judge4
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
5,248 KB
testcase_01 AC 1 ms
5,376 KB
testcase_02 AC 2 ms
5,376 KB
testcase_03 AC 2 ms
5,376 KB
testcase_04 AC 1 ms
5,376 KB
testcase_05 AC 1 ms
5,376 KB
testcase_06 AC 2 ms
5,376 KB
testcase_07 AC 1 ms
5,376 KB
testcase_08 AC 2 ms
5,376 KB
testcase_09 AC 2 ms
5,376 KB
testcase_10 AC 2 ms
5,376 KB
testcase_11 AC 2 ms
5,376 KB
testcase_12 AC 1 ms
5,376 KB
testcase_13 AC 2 ms
5,376 KB
testcase_14 AC 1 ms
5,376 KB
testcase_15 AC 2 ms
5,376 KB
testcase_16 AC 2 ms
5,376 KB
testcase_17 AC 1 ms
5,376 KB
testcase_18 AC 81 ms
14,276 KB
testcase_19 AC 82 ms
14,144 KB
testcase_20 AC 82 ms
14,276 KB
testcase_21 AC 81 ms
14,400 KB
testcase_22 AC 84 ms
14,276 KB
testcase_23 AC 93 ms
14,276 KB
testcase_24 AC 92 ms
14,180 KB
testcase_25 AC 91 ms
14,276 KB
testcase_26 AC 91 ms
14,268 KB
testcase_27 AC 92 ms
14,272 KB
testcase_28 AC 92 ms
14,276 KB
testcase_29 AC 90 ms
14,276 KB
testcase_30 AC 91 ms
14,268 KB
testcase_31 AC 92 ms
14,272 KB
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コンパイルメッセージ
main.cpp: In function 'int main()':
main.cpp:213:14: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17' [-Wc++17-extensions]
  213 |     for(auto [x,y]:S){
      |              ^
main.cpp:221:14: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17' [-Wc++17-extensions]
  221 |     for(auto [x,y]:T){
      |              ^
main.cpp:227:12: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17' [-Wc++17-extensions]
  227 |   for(auto [x,y]:S){
      |            ^
main.cpp:230:12: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17' [-Wc++17-extensions]
  230 |   for(auto [x,y]:T){
      |            ^
main.cpp:235:12: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17' [-Wc++17-extensions]
  235 |   for(auto [x,y]:vv){
      |            ^

ソースコード

diff # 

#pragma GCC target("avx")
#pragma GCC optimize("O3")
#pragma GCC optimize("unroll-loops")
#include<bits/stdc++.h>
// #include<ext/pb_ds/assoc_container.hpp>
// #include<ext/pb_ds/tree_policy.hpp>
// #include<ext/pb_ds/tag_and_trait.hpp>
// using namespace __gnu_pbds;
// #include<boost/multiprecision/cpp_int.hpp>
// namespace multiprecisioninteger = boost::multiprecision;
// using cint=multiprecisioninteger::cpp_int;
using namespace std;
using ll=long long;
#define double long double
using datas=pair<ll,ll>;
using ddatas=pair<double,double>;
using tdata=pair<ll,datas>;
using vec=vector<ll>;
using mat=vector<vec>;
using pvec=vector<datas>;
using pmat=vector<pvec>;
// using llset=tree<ll,null_type,less<ll>,rb_tree_tag,tree_order_statistics_node_update>;
#define For(i,a,b) for(i=a;i<(ll)b;++i)
#define bFor(i,b,a) for(i=b,--i;i>=(ll)a;--i)
#define rep(i,N) For(i,0,N)
#define rep1(i,N) For(i,1,N)
#define brep(i,N) bFor(i,N,0)
#define brep1(i,N) bFor(i,N,1)
#define all(v) (v).begin(),(v).end()
#define allr(v) (v).rbegin(),(v).rend()
#define vsort(v) sort(all(v))
#define vrsort(v) sort(allr(v))
#define uniq(v) vsort(v);(v).erase(unique(all(v)),(v).end())
#define endl "\n"
#define eb emplace_back
#define print(x) cout<<x<<endl
#define printyes print("Yes")
#define printno print("No")
#define printYES print("YES")
#define printNO print("NO")
#define output(v) do{bool f=0;for(auto outi:v){cout<<(f?" ":"")<<outi;f=1;}cout<<endl;}while(0)
#define matoutput(v) do{for(auto outimat:v)output(outimat);}while(0)
constexpr ll mod=1000000007;
// constexpr ll mod=998244353;
constexpr ll inf=1LL<<60;
constexpr double eps=1e-9;
const double PI=acos(-1);
template<class T,class E> ostream& operator<<(ostream& os,const pair<T,E>& p){return os<<"("<<p.first<<","<<p.second<<")";}
template<class T> ostream& operator<<(ostream& os,const vector<T>& v){
  os<<"{";bool f=false;
  for(auto& x:v){if(f)os<<",";os<<x;f=true;}
  os<<"}";
  return os;
}
template<class T> ostream& operator<<(ostream& os,const set<T>& v){
  os<<"{";bool f=false;
  for(auto& x:v){if(f)os<<",";os<<x;f=true;}
  os<<"}";
  return os;
}
template<class T> inline bool chmax(T& a,T b){bool x=a<b;if(x)a=b;return x;}
template<class T> inline bool chmin(T& a,T b){bool x=a>b;if(x)a=b;return x;}
#ifdef DEBUG
void debugg(){cout<<endl;}
template<class T,class... Args>void debugg(const T& x,const Args&... args){cout<<" "<<x;debugg(args...);}
#define debug(...) cout<<__LINE__<<" ["<<#__VA_ARGS__<<"]:",debugg(__VA_ARGS__)
#else
#define debug(...) (void(0))
#endif

void startupcpp(){
  cin.tie(0);
  ios::sync_with_stdio(false);
  cout<<fixed<<setprecision(15);
}

double distance(ddatas x,ddatas y){
  double a=x.first-y.first,b=x.second-y.second;
  return sqrt(a*a+b*b);
}

ll modinv(ll a,ll m=mod) {
  ll b=m,u=1,v=0,t;
  while(b){
    t=a/b;
    a-=t*b; swap(a,b);
    u-=t*v; swap(u,v);
  }
  return (u+m)%m;
}

ll moddevide(ll a,ll b){return (a*modinv(b))%mod;}

vec modncrlistp,modncrlistm;

ll modncr(ll n,ll r){
  if(n<r)return 0;
  ll i,size=modncrlistp.size();
  if(size<=n){
    modncrlistp.resize(n+1);
    modncrlistm.resize(n+1);
    if(!size){
      modncrlistp[0]=modncrlistm[0]=1;
      size++;
    }
    For(i,size,n+1){
      modncrlistp[i]=modncrlistp[i-1]*i%mod;
      modncrlistm[i]=modinv(modncrlistp[i]);
    }
  }
  return modncrlistp[n]*modncrlistm[r]%mod*modncrlistm[n-r]%mod;
}

ll modpow(ll a,ll n,ll m=mod){
  ll res=1;
  while(n>0){
    if(n&1)res=res*a%m;
    a=a*a%m;
    n>>=1;
  }
  return res;
}

ll gcd(ll a,ll b){if(!b)return abs(a);return (a%b==0)?abs(b):gcd(b,a%b);}
ll lcm(ll a,ll b){return a/gcd(a,b)*b;}

ll countdigits(ll n,ll k=10){
  ll ans=0;
  while(n){n/=k;ans++;}
  return ans;
}

ll sumdigits(ll n,ll k=10){
  ll ans=0;
  while(n){ans+=n%k;n/=k;}
  return ans;
}
template <typename T>
struct BinaryIndexedTree{
  int size,bitn=0;
  T I;
  using func=function<T(T,T)>;
  func F;
  vector<T> tree;
  BinaryIndexedTree(int N,T e,func f):size(N+1),I(e),F(f),tree(size,e){}
  BinaryIndexedTree(int N):size(N+1),I(0),F([](T a,T b){return a+b;}),tree(size,0){}
  void act(int i,T x){
    for(++i;i<size;i+=-i&i){
      tree[i]=F(tree[i],x);
    }
  }
  //return F([0,i]);
  T queli(int i){
    T res=I;
    for(++i;i>0;i-=-i&i){
      res=F(tree[i],res);
    }
    return res;
  }
  //sum([l,r));
  T sum(int l,int r){
    // if(--l>--r)return 0;
    assert(--l<=--r);
    if(l<0)return queli(r);
    else return queli(r)-queli(l);
  }
  //only(N,+)
  int lower_bound(int x){
    int i=0;
    if(!bitn){
      i=size;bitn=1;
      while(i){
        i>>=1;bitn<<=1;
      }
      i=0;
    }
    for(int k=bitn;k;k>>=1){
      if(i+k<size&&tree[i+k]<x){
        i+=k;
        x-=tree[i];
      }
    }
    return i;
  }
};
ll N,M,K,H,W,A,B,C,D;
string s,t;
ll ans;
int main(){
  startupcpp();
  // int codeforces;cin>>codeforces;while(codeforces--){
  ll i,j;
  cin>>N;
  vec v(N);
  pvec S,T;
  rep(i,N){
    cin>>v[i];
    --v[i];
  }
  if(v[0]<v[1])S.emplace_back(v[0],v[1]-1);
  else T.emplace_back(v[0],v[1]+1);
  rep1(i,N-1){
    if(v[i]<v[i+1])S.emplace_back(v[i],min(v[i-1],v[i+1])-1);
    else T.emplace_back(v[i],max(v[i-1],v[i+1])+1);
  }
  if(v[N-1]<v[N-2])S.emplace_back(v[N-1],v[N-2]-1);
  else T.emplace_back(v[N-1],v[N-2]+1);
  vsort(S);
  vrsort(T);
  debug(S,T);
  {
    BinaryIndexedTree<ll> tree(N+1);
    for(auto [x,y]:S){
      ans+=tree.sum(x,N);
      tree.act(y,1);
    }
    debug(ans);
  }
  {
    BinaryIndexedTree<ll> tree(N+1);
    for(auto [x,y]:T){
      ans+=tree.sum(0,x+1);
      tree.act(y,1);
    }
  }
  vector<tdata> vv;
  for(auto [x,y]:S){
    vv.eb(y,datas(x,1));
  }
  for(auto [x,y]:T){
    vv.eb(x,datas(y,-1));
  }
  vsort(vv);
  BinaryIndexedTree<ll> tree(N+1);
  for(auto [x,y]:vv){
    if(y.second>0){
      ans+=tree.sum(0,y.first+1);
    }else{
      tree.act(y.first,1);
    }
  }
  print(ans);
// }
}
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