結果

問題 No.992 最長増加部分列の数え上げ
ユーザー 👑 tute7627
提出日時 2020-02-14 23:18:32
言語 C++14
(gcc 13.3.0 + boost 1.87.0)
結果
AC  
実行時間 133 ms / 2,000 ms
コード長 4,992 bytes
コンパイル時間 2,379 ms
コンパイル使用メモリ 192,512 KB
実行使用メモリ 33,304 KB
最終ジャッジ日時 2024-10-06 13:18:03
合計ジャッジ時間 8,029 ms
ジャッジサーバーID
(参考情報)
judge2 / judge1
このコードへのチャレンジ
(要ログイン)
ファイルパターン 結果
sample AC * 3
other AC * 42
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 #
プレゼンテーションモードにする

#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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