結果

問題 No.1270 Range Arrange Query
ユーザー jupirojupiro
提出日時 2020-10-29 00:02:26
言語 C++17
(gcc 12.3.0 + boost 1.83.0)
結果
AC  
実行時間 761 ms / 7,000 ms
コード長 6,762 bytes
コンパイル時間 2,177 ms
コンパイル使用メモリ 151,624 KB
実行使用メモリ 5,376 KB
最終ジャッジ日時 2024-07-21 22:28:32
合計ジャッジ時間 6,980 ms
ジャッジサーバーID
(参考情報)
judge4 / judge1
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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 1 ms
5,376 KB
testcase_05 AC 2 ms
5,376 KB
testcase_06 AC 40 ms
5,376 KB
testcase_07 AC 388 ms
5,376 KB
testcase_08 AC 60 ms
5,376 KB
testcase_09 AC 273 ms
5,376 KB
testcase_10 AC 290 ms
5,376 KB
testcase_11 AC 753 ms
5,376 KB
testcase_12 AC 749 ms
5,376 KB
testcase_13 AC 761 ms
5,376 KB
testcase_14 AC 20 ms
5,376 KB
testcase_15 AC 36 ms
5,376 KB
testcase_16 AC 39 ms
5,376 KB
testcase_17 AC 40 ms
5,376 KB
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ソースコード

diff #

#include <iostream>
#include <string>
#include <sstream>
#include <stack>
#include <algorithm>
#include <cmath>
#include <queue>
#include <bitset>
#include <iomanip>
#include <limits>
#include <chrono>
#include <random>
#include <array>
#include <unordered_map>
#include <functional>
#include <complex>
#include <numeric>
#include <cctype>
#include <map>
#include <set>
#include <cstdlib>
#include <bitset>
#include <tuple>
#include <assert.h>
#include <deque>
#include <utility>
#include <fstream>

using namespace std;
typedef long long ll;
using ull = unsigned long long;

template<class T> inline bool chmax(T& a, T b) { if (a < b) { a = b; return 1; } return 0; }
template<class T> inline bool chmin(T& a, T b) { if (a > b) { a = b; return 1; } return 0; }
template<typename T> T gcd(T a, T b) { a = abs(a), b = abs(b); while (b > 0) { tie(a, b) = make_pair(b, a % b); } return a; }
mt19937 rnd(chrono::steady_clock::now().time_since_epoch().count());

constexpr long long INF = 1LL << 60;
constexpr int inf = 1000000007;
//constexpr long long mod = 1000000007LL;
constexpr long long mod = 998244353;
constexpr int MAX = 1100000;

struct Mo {
	int n;
	vector<pair<int, int>> lr;
	Mo(int n) :n(n) {}
	//[l, r)
	void add(int l, int r) {
		lr.emplace_back(l, r);
	}
	template<typename AL, typename AR, typename EL, typename ER, typename O>
	void build(const AL& add_left, const AR& add_right, const EL& erase_left, const ER& erase_right, const O& out) {
		int query_size = lr.size();
		int bs = n / min(n, (int)sqrt(query_size));
		vector<int> ord(query_size);
		iota(ord.begin(), ord.end(), 0);
		sort(ord.begin(), ord.end(), [&](auto a, auto b) {
			int a_block_index = lr[a].first / bs;
			int b_block_index = lr[b].first / bs;
			if (a_block_index != b_block_index) return a_block_index < b_block_index;
			else return (a_block_index & 1) ? lr[a].second > lr[b].second : lr[a].second < lr[b].second;
			});
		int l = 0, r = 0;
		for (auto idx : ord) {
			while (l > lr[idx].first) add_left(--l);
			while (r < lr[idx].second) add_right(r++);
			while (l < lr[idx].first) erase_left(l++);
			while (r > lr[idx].second) erase_right(--r);
			out(idx);
		}
	}

	template<typename A, typename E, typename O>
	void build(const A& add, const E& erase, const O& out) {
		build(add, add, erase, erase, out);
	}
};

template<typename T>
struct BIT {
	int n;
	vector<T> bit;
	BIT() :n(0) {}
	BIT(int _n) :n(_n) { bit = vector<T>(n + 1); }
	void add1(int idx, T val) {
		for (int i = idx; i <= n; i += i & -i) bit[i] += val;
	}
	T sum1(int idx) {
		T res = 0;
		for (int i = idx; i > 0; i -= i & -i) res += bit[i];
		return res;
	}
	//0-indexed
	void add(int idx, T val) { add1(idx + 1, val); }
	//0-indexed [left, right)
	T sum(int left, int right) { return sum1(right) - sum1(left); }

	int lower_bound(T x) {
		int res = 0;
		int k = 1;
		while (2 * k <= n) k <<= 1;
		for (; k > 0; k >>= 1) {
			if (res + k <= n and bit[res + k] < x) {
				x -= bit[res + k];
				res += k;
			}
		}
		return res;
	}
};

/**
 * @brief Lazy-Segment-Tree(遅延伝搬セグメント木)
 * @docs docs/lazy-segment-tree.md
 */
template< typename Monoid, typename OperatorMonoid, typename F, typename G, typename H >
struct LazySegmentTree {
	int sz, height;
	vector< Monoid > data;
	vector< OperatorMonoid > lazy;
	const F f;
	const G g;
	const H h;
	const Monoid M1;
	const OperatorMonoid OM0;

	LazySegmentTree(int n, const F f, const G g, const H h,
		const Monoid& M1, const OperatorMonoid OM0)
		: f(f), g(g), h(h), M1(M1), OM0(OM0) {
		sz = 1;
		height = 0;
		while (sz < n) sz <<= 1, height++;
		data.assign(2 * sz, M1);
		lazy.assign(2 * sz, OM0);
	}

	void set(int k, const Monoid& x) {
		data[k + sz] = x;
	}

	void build() {
		for (int k = sz - 1; k > 0; k--) {
			data[k] = f(data[2 * k + 0], data[2 * k + 1]);
		}
	}

	inline void propagate(int k) {
		if (lazy[k] != OM0) {
			lazy[2 * k + 0] = h(lazy[2 * k + 0], lazy[k]);
			lazy[2 * k + 1] = h(lazy[2 * k + 1], lazy[k]);
			data[k] = apply(k);
			lazy[k] = OM0;
		}
	}

	inline Monoid apply(int k) {
		return lazy[k] == OM0 ? data[k] : g(data[k], lazy[k]);
	}

	inline void recalc(int k) {
		while (k >>= 1) data[k] = f(apply(2 * k + 0), apply(2 * k + 1));
	}

	inline void thrust(int k) {
		for (int i = height; i > 0; i--) propagate(k >> i);
	}

	void update(int a, int b, const OperatorMonoid& x) {
		if (a >= b) return;
		thrust(a += sz);
		thrust(b += sz - 1);
		for (int l = a, r = b + 1; l < r; l >>= 1, r >>= 1) {
			if (l & 1) lazy[l] = h(lazy[l], x), ++l;
			if (r & 1) --r, lazy[r] = h(lazy[r], x);
		}
		recalc(a);
		recalc(b);
	}

	Monoid query(int a, int b) {
		if (a >= b) return M1;
		thrust(a += sz);
		thrust(b += sz - 1);
		Monoid L = M1, R = M1;
		for (int l = a, r = b + 1; l < r; l >>= 1, r >>= 1) {
			if (l & 1) L = f(L, apply(l++));
			if (r & 1) R = f(apply(--r), R);
		}
		return f(L, R);
	}

	Monoid operator[](const int& k) {
		return query(k, k + 1);
	}

};

template< typename Monoid, typename OperatorMonoid, typename F, typename G, typename H >
LazySegmentTree< Monoid, OperatorMonoid, F, G, H > get_lazy_segment_tree
(int N, const F& f, const G& g, const H& h, const Monoid& M1, const OperatorMonoid& OM0) {
	return { N, f, g, h, M1, OM0 };
}
int main()
{

	cin.tie(nullptr);
	ios::sync_with_stdio(false);

	int n, Q; cin >> n >> Q;
	BIT<ll> b1(n), b2(n);
	ll inv = 0;
	vector<int> a(n); for (int i = 0; i < n; i++) cin >> a[i], a[i] -= 1;
	for (int i = 0; i < n; i++) {
		inv += b2.sum(a[i] + 1, n);
		b2.add(a[i], 1);
	}
	Mo mo(n);
	for (int i = 0; i < Q; i++) {
		int l, r; cin >> l >> r;
		l--;
		mo.add(l, r);
	}
	auto f = [&](ll a, ll b)->ll {
		return min(a, b);
	};
	auto g = [&](ll a, ll b)->ll {
		return a + b;
	};
	auto lsg = get_lazy_segment_tree(n, f, g, g, INF, 0);
	for (int i = 0; i < n; i++) lsg.set(i, 0); lsg.build();
	for (int i = 0; i < n; i++) {
		lsg.update(a[i] + 1, n, 1);
	}
	vector<ll> res(Q);
	auto add_left = [&](int idx)->void {
		b1.add(a[idx], -1);
		inv -= b1.sum(a[idx] + 1, n) + b2.sum(0, a[idx]);
		lsg.update(0, a[idx], -1);
	};

	auto add_right = [&](int idx)->void {
		b2.add(a[idx], -1);
		inv -= b1.sum(a[idx] + 1, n) + b2.sum(0, a[idx]);
		lsg.update(a[idx] + 1, n, -1);
	};

	auto erase_left = [&](int idx)->void {
		b1.add(a[idx], 1);
		inv += b1.sum(a[idx] + 1, n) + b2.sum(0, a[idx]);
		lsg.update(0, a[idx], 1);
	};

	auto erase_right = [&](int idx)->void {
		b2.add(a[idx], 1);
		inv += b1.sum(a[idx] + 1, n) + b2.sum(0, a[idx]);
		lsg.update(a[idx] + 1, n, 1);
	};

	auto out = [&](int idx)->void {
		ll len = mo.lr[idx].second - mo.lr[idx].first;
		ll mn = lsg.query(0, n);
		res[idx] = inv + mn * len;
	};

	mo.build(add_left, add_right, erase_left, erase_right, out);
	for (int i = 0; i < res.size(); i++) cout << res[i] << "\n";
}
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