結果
| 問題 |
No.992 最長増加部分列の数え上げ
|
| ユーザー |
はまやんはまやん
|
| 提出日時 | 2020-02-14 23:47:50 |
| 言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
AC
|
| 実行時間 | 238 ms / 2,000 ms |
| コード長 | 4,564 bytes |
| コンパイル時間 | 2,836 ms |
| コンパイル使用メモリ | 205,768 KB |
| 最終ジャッジ日時 | 2025-01-09 00:36:32 |
|
ジャッジサーバーID (参考情報) |
judge1 / judge4 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 42 |
ソースコード
#include<bits/stdc++.h>
#define rep(i,a,b) for(int i=a;i<b;i++)
#define rrep(i,a,b) for(int i=a;i>=b;i--)
#define fore(i,a) for(auto &i:a)
#define all(x) (x).begin(),(x).end()
//#pragma GCC optimize ("-O3")
using namespace std; void _main(); int main() { cin.tie(0); ios::sync_with_stdio(false); _main(); }
typedef long long ll; const int inf = INT_MAX / 2; const ll infl = 1LL << 60;
template<class T>bool chmax(T& a, const T& b) { if (a < b) { a = b; return 1; } return 0; }
template<class T>bool chmin(T& a, const T& b) { if (b < a) { a = b; return 1; } return 0; }
//---------------------------------------------------------------------------------------------------
template<int MOD> struct ModInt {
static const int Mod = MOD; unsigned x; ModInt() : x(0) { }
ModInt(signed sig) { x = sig < 0 ? sig % MOD + MOD : sig % MOD; }
ModInt(signed long long sig) { x = sig < 0 ? sig % MOD + MOD : sig % MOD; }
int get() const { return (int)x; }
ModInt& operator+=(ModInt that) { if ((x += that.x) >= MOD) x -= MOD; return *this; }
ModInt& operator-=(ModInt that) { if ((x += MOD - that.x) >= MOD) x -= MOD; return *this; }
ModInt& operator*=(ModInt that) { x = (unsigned long long)x * that.x % MOD; return *this; }
ModInt& operator/=(ModInt that) { return *this *= that.inverse(); }
ModInt operator+(ModInt that) const { return ModInt(*this) += that; }
ModInt operator-(ModInt that) const { return ModInt(*this) -= that; }
ModInt operator*(ModInt that) const { return ModInt(*this) *= that; }
ModInt operator/(ModInt that) const { return ModInt(*this) /= that; }
ModInt inverse() const {
long long a = x, b = MOD, u = 1, v = 0;
while (b) { long long t = a / b; a -= t * b; std::swap(a, b); u -= t * v; std::swap(u, v); }
return ModInt(u);
}
bool operator==(ModInt that) const { return x == that.x; }
bool operator!=(ModInt that) const { return x != that.x; }
ModInt operator-() const { ModInt t; t.x = x == 0 ? 0 : Mod - x; return t; }
};
template<int MOD> ostream& operator<<(ostream& st, const ModInt<MOD> a) { st << a.get(); return st; };
template<int MOD> ModInt<MOD> operator^(ModInt<MOD> a, unsigned long long k) {
ModInt<MOD> r = 1; while (k) { if (k & 1) r *= a; a *= a; k >>= 1; } return r;
}
typedef ModInt<1000000007> mint;
vector<int> compress1(int* v, int n) {
vector<int> dic;
rep(i, 0, n) dic.push_back(v[i]);
sort(all(dic));
dic.erase(unique(all(dic)), dic.end());
rep(i, 0, n) v[i] = lower_bound(all(dic), v[i]) - dic.begin();
return dic;
}
#define def make_pair(0,mint(1))
using V = pair<int, mint>;
template<int NV> struct SegTree { //[l,r)
V comp(V& l, V& r) {
if (l.first == 0) return r;
if (r.first == 0) return l;
if (l.first < r.first) return r;
else if (l.first > r.first) return l;
return make_pair(l.first, l.second + r.second);
};
vector<V> val; SegTree() { val = vector<V>(NV * 2, def); }
V get(int x, int y, int l = 0, int r = NV, int k = 1) {
if (r <= x || y <= l)return def; if (x <= l && r <= y)return val[k];
auto a = get(x, y, l, (l + r) / 2, k * 2);
auto b = get(x, y, (l + r) / 2, r, k * 2 + 1);
return comp(a, b);
}
void update(int i, V v) {
i += NV; val[i] = v;
while (i > 1) i >>= 1, val[i] = comp(val[i * 2], val[i * 2 + 1]);
}
V operator[](int x) { return get(x, x + 1); }
};
/*---------------------------------------------------------------------------------------------------
∧_∧
∧_∧ (´<_` ) Welcome to My Coding Space!
( ´_ゝ`) / ⌒i @hamayanhamayan0
/ \ | |
/ / ̄ ̄ ̄ ̄/ |
__(__ニつ/ _/ .| .|____
\/____/ (u ⊃
---------------------------------------------------------------------------------------------------*/
int N, A[201010];
SegTree<1 << 18> st;
//---------------------------------------------------------------------------------------------------
void _main() {
cin >> N;
rep(i, 0, N) cin >> A[i];
compress1(A, N);
rep(i, 0, N) {
auto p = st.get(0, A[i]);
p.first++;
auto cu = st[A[i]];
st.update(A[i], st.comp(cu, p));
}
cout << st.get(0, N).second << endl;
}
はまやんはまやん