Submission #96000

#	Time	Username	Problem	Language	Result	Execution time	Memory
96000		diamond_duke	Bubble Sort 2 (JOI18_bubblesort2)	C++11	100 / 100	2751 ms	67940 KiB

bubblesort2

#include "bubblesort2.h"
#include <algorithm>
#include <utility>
#include <vector>
using ll = long long;
ll seg[4000005], lazy[4000005];
inline void paint(int u, ll x)
{
	seg[u] += x;
	lazy[u] += x;
}
inline void push_down(int u)
{
	if (lazy[u])
	{
		paint(u << 1, lazy[u]);
		paint(u << 1 | 1, lazy[u]);
		lazy[u] = 0;
	}
}
inline void modify(int u, int l, int r, int L, int R, ll x)
{
	if (L <= l && r <= R)
	{
		paint(u, x);
		return;
	}
	push_down(u);
	int m = l + r >> 1;
	if (L <= m)
		modify(u << 1, l, m, L, R, x);
	if (m < R)
		modify(u << 1 | 1, m + 1, r, L, R, x);
	seg[u] = std::max(seg[u << 1], seg[u << 1 | 1]);
}
std::vector<int> countScans(std::vector<int> arr, std::vector<int> qx, std::vector<int> qv)
{
	int n = arr.size(), q = qx.size();
	std::vector<std::pair<int, int> > app;
	for (int i = 0; i < n; i++)
		app.emplace_back(arr[i], i);
	for (int i = 0; i < q; i++)
		app.emplace_back(qv[i], qx[i]);
	std::sort(app.begin(), app.end());
	app.erase(std::unique(app.begin(), app.end()), app.end());
	auto get_idx = [&] (std::pair<int, int> x)
	{
		return std::lower_bound(app.begin(), app.end(), x) - app.begin();
	};
	auto update = [&] (int pos, int coef)
	{
		int idx = get_idx({arr[pos], pos});
		modify(1, 0, app.size() - 1, idx, idx, pos * coef);
		modify(1, 0, app.size() - 1, get_idx({arr[pos], -1}), app.size() - 1, -coef);
	};
	for (int i = 0; i < n; i++)
		update(i, 1);
	std::vector<int> ans(q);
	for (int i = 0; i < q; i++)
	{
		int x = qx[i];
		update(x, -1);
		arr[x] = qv[i];
		update(x, 1);
		ans[i] = seg[1] + 1;
	}
	return ans;
}

Compilation message (stderr)

bubblesort2.cpp: In function 'void modify(int, int, int, int, int, ll)':
bubblesort2.cpp:29:12: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  int m = l + r >> 1;
          ~~^~~

• Subtask 1: 17 / 17
• Subtask 2: 21 / 21
• Subtask 3: 22 / 22
• Subtask 4: 40 / 40