結果

問題 No.992 最長増加部分列の数え上げ
ユーザー FF256grhyFF256grhy
提出日時 2020-02-14 22:45:26
言語 C++14
(gcc 12.3.0 + boost 1.83.0)
結果
AC  
実行時間 189 ms / 2,000 ms
コード長 6,054 bytes
コンパイル時間 1,847 ms
コンパイル使用メモリ 177,748 KB
実行使用メモリ 13,280 KB
最終ジャッジ日時 2024-04-16 02:44:13
合計ジャッジ時間 8,929 ms
ジャッジサーバーID
（参考情報） 		judge4 / judge3
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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 68 ms
7,980 KB
testcase_05 AC 49 ms
5,900 KB
testcase_06 AC 84 ms
8,120 KB
testcase_07 AC 62 ms
7,916 KB
testcase_08 AC 32 ms
5,616 KB
testcase_09 AC 63 ms
7,932 KB
testcase_10 AC 85 ms
8,244 KB
testcase_11 AC 103 ms
8,432 KB
testcase_12 AC 22 ms
5,376 KB
testcase_13 AC 58 ms
7,892 KB
testcase_14 AC 59 ms
7,892 KB
testcase_15 AC 22 ms
5,376 KB
testcase_16 AC 164 ms
12,888 KB
testcase_17 AC 32 ms
5,740 KB
testcase_18 AC 57 ms
7,880 KB
testcase_19 AC 105 ms
8,296 KB
testcase_20 AC 182 ms
13,156 KB
testcase_21 AC 182 ms
13,028 KB
testcase_22 AC 184 ms
13,156 KB
testcase_23 AC 184 ms
13,024 KB
testcase_24 AC 185 ms
13,028 KB
testcase_25 AC 186 ms
13,028 KB
testcase_26 AC 183 ms
13,032 KB
testcase_27 AC 189 ms
13,028 KB
testcase_28 AC 185 ms
13,156 KB
testcase_29 AC 188 ms
13,032 KB
testcase_30 AC 165 ms
13,024 KB
testcase_31 AC 168 ms
13,032 KB
testcase_32 AC 164 ms
13,148 KB
testcase_33 AC 165 ms
13,084 KB
testcase_34 AC 165 ms
13,028 KB
testcase_35 AC 157 ms
13,152 KB
testcase_36 AC 155 ms
13,028 KB
testcase_37 AC 156 ms
13,028 KB
testcase_38 AC 159 ms
13,028 KB
testcase_39 AC 156 ms
13,028 KB
testcase_40 AC 164 ms
13,160 KB
testcase_41 AC 166 ms
13,028 KB
testcase_42 AC 165 ms
13,160 KB
testcase_43 AC 164 ms
13,280 KB
testcase_44 AC 164 ms
13,156 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>
using namespace std;
using LL = long long int;
#define incID(i, l, r) for(int i = (l)    ; i <  (r); ++i)
#define decID(i, l, r) for(int i = (r) - 1; i >= (l); --i)
#define incII(i, l, r) for(int i = (l)    ; i <= (r); ++i)
#define decII(i, l, r) for(int i = (r)    ; i >= (l); --i)
#define inc(i, n)  incID(i, 0, n)
#define dec(i, n)  decID(i, 0, n)
#define inc1(i, n) incII(i, 1, n)
#define dec1(i, n) decII(i, 1, n)
#define inID(v, l, r) ((l) <= (v) && (v) <  (r))
#define inII(v, l, r) ((l) <= (v) && (v) <= (r))
#define PB push_back
#define EB emplace_back
#define MP make_pair
#define FI first
#define SE second
#define FR front()
#define BA back()
#define ALL(v) v.begin(), v.end()
#define RALL(v) v.rbegin(), v.rend()
auto setmin   = [](auto & a, auto b) { return (b <  a ? a = b, true : false); };
auto setmax   = [](auto & a, auto b) { return (b >  a ? a = b, true : false); };
auto setmineq = [](auto & a, auto b) { return (b <= a ? a = b, true : false); };
auto setmaxeq = [](auto & a, auto b) { return (b >= a ? a = b, true : false); };
#define SI(v) static_cast<int>(v.size())
#define RF(e, v) for(auto & e: v)
#define until(e) while(! (e))
#define if_not(e) if(! (e))
#define ef else if
#define UR assert(false)
#define IN(T, ...) T __VA_ARGS__; IN_(__VA_ARGS__);
void IN_() { };
template<typename T, typename ... U> void IN_(T & a, U & ... b) { cin >> a; IN_(b ...); };
template<typename T> void OUT(T && a) { cout << a << endl; }
template<typename T, typename ... U> void OUT(T && a, U && ... b) { cout << a << " "; OUT(b ...); }

// ---- ----

template<typename T> class SegmentTree {
private:
	int n, s;
	vector<T> a;
	function<T(T &, T &)> f;
	T e;
	bool ok;
public:
	SegmentTree() { n = 0; }
	SegmentTree(int nn, function<T(T &, T &)> ff, T ee) { init(nn, ff, ee); }
	void init(int nn, function<T(T &, T &)> ff, T ee) {
		n = nn;
		f = ff;
		e = ee;
		s = 1;
		while(s < n) { s *= 2; }
		a = vector<T>(2 * s, e);
		ok = true;
	}
	void shift(int & p) {
		assert(inID(p, 0, n));
		p += s;
	}
	void apply(int p, function<void(T &)> g) {
		shift(p);
		g(a[p]);
		while(p > 1) {
			p /= 2;
			a[p] = f(a[2 * p], a[2 * p + 1]);
		}
	}
	T fold_ID(int l, int r) {
		assert(ok);
		assert(inII(l, 0, n)); l += s;
		assert(inII(r, 0, n)); r += s; r--;
		T x = e, y = e;
		while(l <= r) {
			if(l % 2 == 1) { x = f(x, a[l]); l++; }
			if(r % 2 == 0) { y = f(a[r], y); r--; }
			l /= 2;
			r /= 2;
		}
		return f(x, y);
	}
	T fold_II(int l, int r) { return fold_ID(l + 0, r + 1); }
	T fold_CI(int l, int r) { return fold_ID(l + 1, r + 1); }
	T fold_CD(int l, int r) { return fold_ID(l + 1, r + 0); }
	const T & operator[](int p) {
		shift(p);
		return a[p];
	}
	T & ref(int p) {
		shift(p);
		ok = false;
		return a[p];
	}
	void update() {
		dec(i, s) { a[i] = f(a[2 * i], a[2 * i + 1]); }
		ok = true;
	}
};
#define OP(s) [&](auto & A, auto & B) { return s; }
#define AP(s) [&](auto & A) { s; }

// ----

template<LL M> class ModInt {
private:
	LL v;
	pair<LL, LL> ext_gcd(LL a, LL b) {
		if(b == 0) { assert(a == 1); return { 1, 0 }; }
		auto p = ext_gcd(b, a % b);
		return { p.SE, p.FI - (a / b) * p.SE };
	}
public:
	ModInt(LL vv = 0) { v = vv; if(abs(v) >= M) { v %= M; } if(v < 0) { v += M; } }
	LL get_v() { return v; }
	ModInt inv() { return ext_gcd(M, v).SE; }
	ModInt exp(LL b) {
		ModInt p = 1, a = v; if(b < 0) { a = a.inv(); b = -b; }
		while(b) { if(b & 1) { p *= a; } a *= a; b >>= 1; }
		return p;
	}
	friend bool      operator< (ModInt    a, ModInt   b) { return (a.v <  b.v); }
	friend bool      operator> (ModInt    a, ModInt   b) { return (a.v >  b.v); }
	friend bool      operator<=(ModInt    a, ModInt   b) { return (a.v <= b.v); }
	friend bool      operator>=(ModInt    a, ModInt   b) { return (a.v >= b.v); }
	friend bool      operator==(ModInt    a, ModInt   b) { return (a.v == b.v); }
	friend bool      operator!=(ModInt    a, ModInt   b) { return (a.v != b.v); }
	friend ModInt    operator+ (ModInt    a            ) { return ModInt(+a.v); }
	friend ModInt    operator- (ModInt    a            ) { return ModInt(-a.v); }
	friend ModInt    operator+ (ModInt    a, ModInt   b) { return ModInt(a.v + b.v); }
	friend ModInt    operator- (ModInt    a, ModInt   b) { return ModInt(a.v - b.v); }
	friend ModInt    operator* (ModInt    a, ModInt   b) { return ModInt(a.v * b.v); }
	friend ModInt    operator/ (ModInt    a, ModInt   b) { return a * b.inv(); }
	friend ModInt    operator^ (ModInt    a, LL       b) { return a.exp(b); }
	friend ModInt  & operator+=(ModInt  & a, ModInt   b) { return (a = a + b); }
	friend ModInt  & operator-=(ModInt  & a, ModInt   b) { return (a = a - b); }
	friend ModInt  & operator*=(ModInt  & a, ModInt   b) { return (a = a * b); }
	friend ModInt  & operator/=(ModInt  & a, ModInt   b) { return (a = a / b); }
	friend ModInt  & operator^=(ModInt  & a, LL       b) { return (a = a ^ b); }
	friend istream & operator>>(istream & s, ModInt & b) { s >> b.v; b = ModInt(b.v); return s; }
	friend ostream & operator<<(ostream & s, ModInt   b) { return (s << b.v); }
};

// ----

using MI = ModInt< 1'000'000'007 >;

#define PAIR_COMP(f, a, b, c, d) \
template<typename F, typename S> struct f { \
	bool operator() (pair<F, S> x, pair<F, S> y) { return (x.a c y.a) || (x.a == y.a && x.b d y.b); } \
}
PAIR_COMP(FLSL, FI, SE, <, <);
PAIR_COMP(FLSG, FI, SE, <, >);
PAIR_COMP(FGSL, FI, SE, >, <);
PAIR_COMP(FGSG, FI, SE, >, >);
PAIR_COMP(SLFL, SE, FI, <, <);
PAIR_COMP(SLFG, SE, FI, <, >);
PAIR_COMP(SGFL, SE, FI, >, <);
PAIR_COMP(SGFG, SE, FI, >, >);

int main() {
	IN(int, n);
	vector<pair<int, int>> a(n);
	inc(i, n) {
		cin >> a[i].FI;
		a[i].SE = i;
	}
	int INF = 1'000'000'001;
	a.EB(INF, n);
	sort(ALL(a), FLSG<int, int>());
	
	auto f = [](auto a, auto b) -> pair<int, MI> {
		if(a.FI != b.FI) { return max(a, b); }
		else { return { a.FI, a.SE + b.SE }; }
	};
	SegmentTree<pair<int, MI>> st(n + 1, f, { 0, 0 });
	
	inc(i, n + 1) {
		int p = a[i].SE;
		auto v = st.fold_ID(0, p);
		if(v.FI == 0) { v.SE = 1; }
		v.FI++;
		st.apply(p, AP(A = v));
	}
	OUT(st[n].SE);
}
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