結果

問題 No.924 紲星
ユーザー polylogKpolylogK
提出日時 2019-09-05 21:40:41
言語 C++14
(gcc 13.2.0 + boost 1.83.0)
結果
WA  
(最新)
AC  
(最初)
実行時間 -
コード長 5,496 bytes
コンパイル時間 2,012 ms
コンパイル使用メモリ 187,140 KB
実行使用メモリ 8,696 KB
最終ジャッジ日時 2023-10-13 08:15:36
合計ジャッジ時間 9,429 ms
ジャッジサーバーID
(参考情報)
judge12 / judge15
このコードへのチャレンジ
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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 1 ms
4,352 KB
testcase_01 AC 2 ms
4,348 KB
testcase_02 WA -
testcase_03 AC 3 ms
4,348 KB
testcase_04 AC 2 ms
4,352 KB
testcase_05 AC 4 ms
4,352 KB
testcase_06 AC 3 ms
4,352 KB
testcase_07 AC 2 ms
4,348 KB
testcase_08 RE -
testcase_09 RE -
testcase_10 RE -
testcase_11 RE -
testcase_12 RE -
testcase_13 RE -
testcase_14 RE -
testcase_15 RE -
testcase_16 RE -
testcase_17 RE -
testcase_18 TLE -
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ソースコード

diff #

#include <bits/stdc++.h>
using namespace std::literals::string_literals;
using i64 = long long;
using std::cout;
using std::endl;
using std::cin;

template<typename T>
std::vector<T> make_v(size_t a){return std::vector<T>(a);}

template<typename T,typename... Ts>
auto make_v(size_t a,Ts... ts){
  return std::vector<decltype(make_v<T>(ts...))>(a,make_v<T>(ts...));
}

template<typename Monoid>
class segment_tree {
	using value_type = Monoid;
	using size_type = size_t;

	using binary_function = std::function<value_type(value_type, value_type)>;
	using checker = std::function<bool(value_type)>;
	
	const size_type size_;
	size_type height_;

	const value_type id;
	const binary_function bi_func;
	std::vector<value_type> data;
	
	private:
	const size_type get_height(const size_type& size) const {
		size_type height = 1;
		while(1 << height < size) height++;
		return height;
	}
	const size_type base_size() const {
		return 1 << height_;
	}
	void meld(const size_type& index) {
		data[index] = bi_func(data[index << 1 ^ 0], data[index << 1 ^ 1]);
	}
	
	public:
	segment_tree(const size_type& size, const binary_function& bi_func, const value_type& id)
		: size_(size),
		  bi_func(bi_func),
		  id(id) {
		height_ = get_height(size);
		data.assign(base_size() << 1, id);
	}
	value_type fold(size_type left, size_type right) {
		value_type l_value = id,
				   r_value = id;

		for(left += base_size(), right += base_size();
			left < right;
			left >>= 1, right >>= 1) {
			if(left & 1)  l_value = bi_func(l_value, data[left++]);
			if(right & 1) r_value = bi_func(data[--right], r_value); 
		}
		return bi_func(std::move(l_value), std::move(r_value));
	}
	void update(size_type index, const value_type& value) {
		index += base_size();
		data[index] = bi_func(data[index], value);

		while(index >>= 1) meld(index);
	}
	void change(size_type index, const value_type& value) {
		index += base_size();
		data[index] = value;

		while(index >>= 1) meld(index);
	}
	const size_type search(const size_type & left, const checker & check) {
		value_type val = id;
		size_t base_size_ = base_size();
		auto find = [&](auto&& find, size_type k, size_type l, size_type r) -> int {
			if(l + 1 == r) {
				val = bi_func(val, data[k]);
				
				return (check(val) ? k - base_size_ : -1);
			}

			const size_type mid = (l + r) >> 1;
			if(mid <= left) return find(find, k << 1 ^ 1, mid, r);
			if(left <= l and !check(bi_func(val, data[k]))) {
				val = bi_func(val, data[k]);
				return -1;
			}

			const int left_ret = find(find, k << 1 ^ 0, l, mid);
			if(left_ret == -1) return find(find, k << 1 ^ 1, mid, r);
			return left_ret;
		};

		return find(find, 1, 0, base_size_); 
	}
	
	value_type operator[](const size_type& index) const {
		return data[index + base_size()];
	}
	const size_type size() const {
		return size_;
	}
	const bool empty() const {
		return data.empty();
	}
};

int main() {
	// input
	int n, q; scanf("%d%d", &n, &q);
	assert(1 <= n and n <= 1e5);
	assert(1 <= q and q <= 1e5);

	std::vector<int> a(n);
	for(int i = 0; i < n; i++) {
		scanf("%d", &a[i]);

		assert(-1e9 <= a[i] and a[i] <= 1e9);
	}

	std::vector<int> L(q), R(q);
	for(int i = 0; i < q; i++) {
		scanf("%d%d", &L[i], &R[i]);

		assert(1 <= L[i] and L[i] <= n);
		assert(1 <= R[i] and R[i] <= n);
		assert(L[i] <= R[i]);

		L[i]--;
	}
	
	// solve
	std::vector<std::pair<int, int>> vec;
	for(int i = 0; i < n; i++) vec.push_back({a[i], i});
	sort(begin(vec), end(vec));
	
	std::vector<i64> center = [&]{
		using P = std::pair<int, int>;
		
		std::vector<int> Left(q, 0), Right(q, n);
		std::vector<std::pair<int, int>> query, nxt;
		for(int i = 0; i < q; i++) query.push_back({(Left[i] + Right[i]) >> 1, i});

		segment_tree<int> seg(n, [](int a, int b) { return a + b; }, 0);
		while(!query.empty()) {
			sort(begin(query), end(query));
			
			int cur = 0;
			for(int i = 0; i < n; i++) {
				seg.update(vec[i].second, 1);

				if(i + 1 != n - 1 and vec[i].first == vec[i + 1].first) continue;
				while(cur < query.size() and query[cur].first <= i) {
					auto & p = query[cur++];
					int id = p.second, mid = p.first;
		
					int len = (R[id] - L[id] + 1) >> 1;
					int val = seg.fold(L[id], R[id]);
					if(len <= val) Right[id] = mid;
					else Left[id] = mid;

					if(Left[id] + 1 != Right[id])
						nxt.push_back({(Left[id] + Right[id]) >> 1, id});
				}
			}
			
			for(int i = 0; i < n; i++) seg.change(i, 0);
			query.swap(nxt);
			nxt.clear();
		}

		std::vector<i64> center(q);
		for(int i = 0; i < q; i++) center[i] = vec[Right[i]].first;
		return center;
	}();
	
	std::vector<i64> ans = [&]{
		std::vector<i64> ans(q);
		for(int loop = 0; loop < 2; loop++) {
			segment_tree<i64> seg(n, [](i64 a, i64 b) { return a + b; }, 0);
			segment_tree<i64> cnt(n, [](i64 a, i64 b) { return a + b; }, 0);
			
			std::vector<std::pair<int, int>> query;
			for(int i = 0; i < q; i++) query.push_back({center[i], i});
			sort(begin(query), end(query));
			if(loop) reverse(begin(query), end(query));

			int cur = 0;
			for(int i = 0; i < n; i++) {
				seg.update(vec[i].second, vec[i].first);
				cnt.update(vec[i].second, 1);

				while(cur < query.size() and query[cur].first == vec[i].first) {
					auto & p = query[cur++];
					i64 id = p.second, val = p.first;
					
					i64 tmp = val * cnt.fold(L[id], R[id]) - seg.fold(L[id], R[id]);
					ans[id] += tmp * (loop ? -1 : 1);
				}
			}

			reverse(begin(vec), end(vec));
		}
		return ans;
	}();

	for(auto v: ans) printf("%lld\n", v);
	return 0;
}
0