71 lines
1.5 KiB
C++
71 lines
1.5 KiB
C++
/*
|
|
This file is part of Telegram Desktop,
|
|
the official desktop application for the Telegram messaging service.
|
|
|
|
For license and copyright information please follow this link:
|
|
https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
|
|
*/
|
|
#pragma once
|
|
|
|
#include "statistics/statistics_types.h"
|
|
|
|
namespace Statistic {
|
|
|
|
class SegmentTree final {
|
|
public:
|
|
SegmentTree() = default;
|
|
SegmentTree(std::vector<ChartValue> array);
|
|
|
|
[[nodiscard]] bool empty() const {
|
|
return _array.empty();
|
|
}
|
|
[[nodiscard]] explicit operator bool() const {
|
|
return !empty();
|
|
}
|
|
|
|
[[nodiscard]] ChartValue rMaxQ(int from, int to);
|
|
[[nodiscard]] ChartValue rMinQ(int from, int to);
|
|
|
|
private:
|
|
struct Node final {
|
|
ChartValue sum = 0;
|
|
ChartValue max = 0;
|
|
ChartValue min = 0;
|
|
|
|
struct PendingVal {
|
|
[[nodiscard]] explicit operator bool() const {
|
|
return available;
|
|
}
|
|
ChartValue value = 0;
|
|
bool available = false;
|
|
};
|
|
PendingVal pendingVal;
|
|
|
|
int from = 0;
|
|
int to = 0;
|
|
|
|
[[nodiscard]] int size() {
|
|
return to - from + 1;
|
|
}
|
|
};
|
|
|
|
void build(ChartValue v, int from, int size);
|
|
void propagate(ChartValue v);
|
|
void change(Node &n, ChartValue value);
|
|
|
|
[[nodiscard]] ChartValue rMaxQ(ChartValue v, int from, int to);
|
|
[[nodiscard]] ChartValue rMinQ(ChartValue v, int from, int to);
|
|
|
|
[[nodiscard]] bool contains(int from1, int to1, int from2, int to2) const;
|
|
[[nodiscard]] bool intersects(
|
|
int from1,
|
|
int to1,
|
|
int from2,
|
|
int to2) const;
|
|
|
|
std::vector<ChartValue> _array;
|
|
std::vector<Node> _heap;
|
|
|
|
};
|
|
|
|
} // namespace Statistic
|