結果

問題 No.992 最長増加部分列の数え上げ
ユーザー 👑 tute7627tute7627
提出日時 2020-02-14 23:18:32
言語 C++14
(gcc 12.3.0 + boost 1.83.0)
結果
AC  
実行時間 138 ms / 2,000 ms
コード長 4,992 bytes
コンパイル時間 2,347 ms
コンパイル使用メモリ 188,100 KB
実行使用メモリ 33,304 KB
最終ジャッジ日時 2024-04-16 02:53:39
合計ジャッジ時間 8,051 ms
ジャッジサーバーID
（参考情報） 		judge1 / judge4
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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 2 ms
5,376 KB
testcase_02 AC 2 ms
5,376 KB
testcase_03 AC 2 ms
5,376 KB
testcase_04 AC 51 ms
13,088 KB
testcase_05 AC 38 ms
10,596 KB
testcase_06 AC 64 ms
15,296 KB
testcase_07 AC 46 ms
12,200 KB
testcase_08 AC 24 ms
8,104 KB
testcase_09 AC 47 ms
12,356 KB
testcase_10 AC 63 ms
15,224 KB
testcase_11 AC 80 ms
18,400 KB
testcase_12 AC 17 ms
6,376 KB
testcase_13 AC 45 ms
11,636 KB
testcase_14 AC 44 ms
11,776 KB
testcase_15 AC 17 ms
6,640 KB
testcase_16 AC 124 ms
26,232 KB
testcase_17 AC 24 ms
7,980 KB
testcase_18 AC 43 ms
11,620 KB
testcase_19 AC 79 ms
18,132 KB
testcase_20 AC 137 ms
28,180 KB
testcase_21 AC 136 ms
28,244 KB
testcase_22 AC 138 ms
28,316 KB
testcase_23 AC 137 ms
28,440 KB
testcase_24 AC 138 ms
28,348 KB
testcase_25 AC 138 ms
28,324 KB
testcase_26 AC 138 ms
28,312 KB
testcase_27 AC 138 ms
28,240 KB
testcase_28 AC 137 ms
28,312 KB
testcase_29 AC 137 ms
28,388 KB
testcase_30 AC 115 ms
33,012 KB
testcase_31 AC 116 ms
32,280 KB
testcase_32 AC 114 ms
32,280 KB
testcase_33 AC 114 ms
33,052 KB
testcase_34 AC 114 ms
32,152 KB
testcase_35 AC 118 ms
32,152 KB
testcase_36 AC 117 ms
32,060 KB
testcase_37 AC 118 ms
32,276 KB
testcase_38 AC 120 ms
32,284 KB
testcase_39 AC 119 ms
32,152 KB
testcase_40 AC 118 ms
33,176 KB
testcase_41 AC 116 ms
33,256 KB
testcase_42 AC 116 ms
33,292 KB
testcase_43 AC 115 ms
33,304 KB
testcase_44 AC 118 ms
33,300 KB
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ソースコード

diff # 

#include<bits/stdc++.h>
using namespace std;

#define endl '\n'
#define lfs cout<<fixed<<setprecision(10)
#define ALL(a)  (a).begin(),(a).end()
#define ALLR(a)  (a).rbegin(),(a).rend()
#define spa << " " <<
#define fi first
#define se second
#define MP make_pair
#define MT make_tuple
#define PB push_back
#define EB emplace_back
#define rep(i,n,m) for(ll i = (n); i < (ll)(m); i++)
#define rrep(i,n,m) for(ll i = (m) - 1; i >= (ll)(n); i--)
using ll = long long;
using ld = long double;
const ll MOD = 1e9+7;
//const ll MOD = 998244353;
const ll INF = 1e18;
using P = pair<ll, ll>;
template<typename T>
bool chmin(T &a,T b){if(a>b){a=b;return true;}else return false;}
template<typename T>
bool chmax(T &a,T b){if(a<b){a=b;return true;}else return false;}
ll median(ll a,ll b, ll c){return a+b+c-max({a,b,c})-min({a,b,c});}
void ans1(bool x){if(x) cout<<"Yes"<<endl;else cout<<"No"<<endl;}
void ans2(bool x){if(x) cout<<"YES"<<endl;else cout<<"NO"<<endl;}
void ans3(bool x){if(x) cout<<"Yay!"<<endl;else cout<<":("<<endl;}
template<typename T1,typename T2>
void ans(bool x,T1 y,T2 z){if(x)cout<<y<<endl;else cout<<z<<endl;}  
template<typename T>
void debug(vector<vector<T>>&v,ll h,ll w){for(ll i=0;i<h;i++)
{cout<<v[i][0];for(ll j=1;j<w;j++)cout spa v[i][j];cout<<endl;}};
void debug(vector<string>&v,ll h,ll w){for(ll i=0;i<h;i++)
{for(ll j=0;j<w;j++)cout<<v[i][j];cout<<endl;}};
template<typename T>
void debug(vector<T>&v,ll n){if(n!=0)cout<<v[0];
for(ll i=1;i<n;i++)cout spa v[i];cout<<endl;};
template<typename T>
vector<vector<T>>vec(ll x, ll y, T w){
  vector<vector<T>>v(x,vector<T>(y,w));return v;}
ll gcd(ll x,ll y){ll r;while(y!=0&&(r=x%y)!=0){x=y;y=r;}return y==0?x:y;}
vector<ll>dx={1,0,-1,0,1,1,-1,-1};
vector<ll>dy={0,1,0,-1,1,-1,1,-1};
template<typename T>
vector<T> make_v(size_t a,T b){return vector<T>(a,b);}
template<typename... Ts>
auto make_v(size_t a,Ts... ts){
  return vector<decltype(make_v(ts...))>(a,make_v(ts...));
}
ostream &operator<<(ostream &os, pair<ll, ll>&p){
  return os << p.first << " " << p.second;
}  
template< int mod >
struct ModInt {
  ll x;

  ModInt() : x(0) {}

  ModInt(int64_t y) : x(y >= 0 ? y % mod : (mod - (-y) % mod) % mod) {}

  ModInt &operator+=(const ModInt &p) {
    if((x += p.x) >= mod) x -= mod;
    return *this;
  }

  ModInt &operator-=(const ModInt &p) {
    if((x += mod - p.x) >= mod) x -= mod;
    return *this;
  }

  ModInt &operator*=(const ModInt &p) {
    x = (int) (1LL * x * p.x % mod);
    return *this;
  }

  ModInt &operator/=(const ModInt &p) {
    *this *= p.inverse();
    return *this;
  }

  ModInt operator-() const { return ModInt(-x); }

  ModInt operator+(const ModInt &p) const { return ModInt(*this) += p; }

  ModInt operator-(const ModInt &p) const { return ModInt(*this) -= p; }

  ModInt operator*(const ModInt &p) const { return ModInt(*this) *= p; }

  ModInt operator/(const ModInt &p) const { return ModInt(*this) /= p; }

  bool operator==(const ModInt &p) const { return x == p.x; }

  bool operator!=(const ModInt &p) const { return x != p.x; }
  bool operator>(const ModInt &p) const { return x>p.x; }
  bool operator<(const ModInt &p) const { return x<p.x; }
  ModInt inverse() const {
    int a = x, b = mod, u = 1, v = 0, t;
    while(b > 0) {
      t = a / b;
      swap(a -= t * b, b);
      swap(u -= t * v, v);
    }
    return ModInt(u);
  }

  ModInt pow(int64_t n) const {
    ModInt ret(1), mul(x);
    while(n > 0) {
      if(n & 1) ret *= mul;
      mul *= mul;
      n >>= 1;
    }
    return ret;
  }

  friend ostream &operator<<(ostream &os, const ModInt &p) {
    return os << p.x;
  }

  friend istream &operator>>(istream &is, ModInt &a) {
    int64_t t;
    is >> t;
    a = ModInt< mod >(t);
    return (is);
  }

  static int get_mod() { return mod; }
};
using modint = ModInt< MOD >;
modint pow2(int64_t n, int64_t x){
    return modint(n).pow(x);
}
template<typename T>
map<T,ll> compress(vector<T> &t){
  sort(ALL(t));
  t.erase(unique(ALL(t)),t.end());
  map<T, ll> ret;
  for(ll i=0;i<(ll)t.size();i++)
    ret[t[i]]=i;
  return ret;
}
int main(){
  cin.tie(nullptr);
  ios_base::sync_with_stdio(false);
  ll res=0,buf=0;
  bool judge = true;
  ll n;cin>>n;
  vector<ll>a(n);
  rep(i,0,n)cin>>a[i];
  vector<ll>val(n);
  rep(i,0,n)val[i]=a[i];
  val.PB(-INF);
  val.PB(INF);
  auto mp=compress(val);
  ll m=mp.size();
  vector<ll>dp(n+1,INF);
  dp[0]=-INF;
  using PM=pair<ll,modint>;
  /*auto f=[](PM x,PM y){
    return x.fi>x.se;
  };*/
  vector<priority_queue<PM>>que(n+1);
  vector<modint>sum(n+1);
  que[0].emplace(-INF,modint(1));
  sum[0]+=1;
  ll mx=0;
  rep(i,0,n){
    ll idx=lower_bound(ALL(dp),a[i])-dp.begin();
    while(!que.empty()&&que[idx-1].top().fi>=a[i]){
      auto p=que[idx-1].top();
      sum[idx-1]-=p.se;
      que[idx-1].pop();
    }
    que[idx].emplace(a[i],sum[idx-1]);
    sum[idx]+=sum[idx-1];
    dp[idx]=a[i];
    chmax(mx,idx);
  }
  //debug(dp,n+1);
  //ep(i,0,n)cout<<sum[mx]<<endl;
  cout<<sum[mx]<<endl;
  return 0;
}
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