Submission #1212127

#	Time	Username	Problem	Language	Result	Execution time	Memory
1212127		catch_me_if_you_can	Bubble Sort 2 (JOI18_bubblesort2)	C++20	38 / 100	9092 ms	1452 KiB

bubblesort2

#include<bits/stdc++.h>
#include "bubblesort2.h"
using namespace std;
#define in array<int, 2>
#define pb push_back
#define pob pop_back
#define fast() ios_base::sync_with_stdio(false); cin.tie(NULL)

const int MX = 2e5+5;
const int INF = 1e9+1e8;
 
struct fenwick
{
	int N; vector<int> fen;
	void init(int n)
	{
		N = n+3;
		fen.assign(N+1, 0);
		return;
	}
	void add(int x)
	{
		for(int t = x; t < N; t+=(t&-t))
			fen[t]++;
		return;
	}
	int val(int x = -1)
	{
		if(x == -1)
			x = N-1;
		int ret = 0;
		for(int t = x; t; t-=(t&-t))
			ret+=fen[t];
		return ret;
	}
};

vector<int> countScans(vector<int> A, vector<int> x, vector<int> v)
{
	int n = A.size();
	vector<int> G = A;
	for(auto s: v)
		G.pb(s);
	sort(G.begin(), G.end());
	vector<int> H; H.pb(-INF);
	for(auto s: G)
	{
		if(s != H.back())
			H.pb(s);
	}
	vector<int> a(n+1);
	for(int i = 1; i <= n; i++)
		a[i] = lower_bound(H.begin(), H.end(), A[i-1]) - H.begin();
	int q = x.size();
	for(int i = 0; i < q; i++)
		v[i] = lower_bound(H.begin(), H.end(), v[i]) - H.begin();
	int N = H.size()-1;
	fenwick work;

	vector<int> ans(q);

	for(int s = 0; s < q; s++)
	{
		a[x[s]+1] = v[s]; work.init(N);
		int Ans = 0;
		for(int i = 1; i <= n; i++)
		{
			Ans = max(Ans, work.val()-work.val(a[i]));
			work.add(a[i]);
		}
		ans[s] = Ans;
	}
	return ans;
}

• Subtask 1: 17 / 17
• Subtask 2: 21 / 21
• Subtask 3: 0 / 22
• Subtask 4: 0 / 40