Submission #438747

#	Time	Username	Problem	Language	Result	Execution time	Memory
438747		CSQ31	Bubble Sort 2 (JOI18_bubblesort2)	C++17	38 / 100	9103 ms	2248 KiB

bubblesort2

#include "bubblesort2.h"
#include <bits/stdc++.h>
using namespace std;
#define fi first
#define se second
#define sz(a) (int)(a.size())
#define all(a) a.begin(),a.end()
typedef pair<int,int> pii;
vector<int>bit(100000);
int m;
void upd(int pos,int val){
	for(int i=pos;i<=m;i+=i&(-i))bit[i]+=val;
}
int query(int pos){
	int res = 0;
	while(pos){
		res+=bit[pos];
		pos-=pos&(-pos);
	}
	return res;
}
vector<int> countScans(vector<int> a,vector<int> x,vector<int>v){
	int q=sz(x);
	int n = sz(a);
	vector<int> answer(q);
	vector<int>b;
	for(int i=0;i<n;i++)b.push_back(a[i]);
	for(int i=0;i<q;i++)b.push_back(v[i]);
	sort(all(b));
	b.resize(unique(all(b))-b.begin());
	m = sz(b);
	for(int i=0;i<n;i++)a[i] = lower_bound(all(b),a[i])-b.begin()+1;
	for(int i=0;i<q;i++)v[i] = lower_bound(all(b),v[i])-b.begin()+1;
	for (int j=0;j<q;j++) {
		for(int i=1;i<=m;i++)bit[i] = 0;
		a[x[j]] = v[j];
		int mx = 0;
		for(int i=0;i<n;i++){
			mx = max(mx,query(m)-query(a[i]));
			upd(a[i],1);
		}
		answer[j] = mx;
	}
	return answer;
}

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