Submission #343914

#	Time	Username	Problem	Language	Result	Execution time	Memory
343914		flappybird	medians (balkan11_medians)	C++14	10 / 100	545 ms	9184 KiB

medians

#include <bits/stdc++.h>
using namespace std;
#define MAX 602020
int l[MAX], r[MAX];
int tree[MAX];
int arr[MAX];
int s;
vector<int>ans;
void init(int x = 1) {
	if (x >= s) {
		l[x] = r[x] = x - s + 1;
		return;
	}
	init(x * 2);
	init(x * 2 + 1);
	l[x] = l[x * 2];
	r[x] = r[x * 2 + 1];
}
void update(int loc) {
	if (loc == 0) return;
	tree[loc]++;
	update(loc / 2);
}
int sumquery(int low, int high, int loc = 1) {
	if (l[loc] == low && r[loc] == high) return tree[loc];
	else if (r[loc * 2] >= high) return sumquery(low, high, loc * 2);
	else if (l[loc * 2 + 1] <= low) return sumquery(low, high, loc * 2 + 1);
	else return sumquery(low, r[loc * 2], loc * 2) + sumquery(l[loc * 2 + 1], high, loc * 2 + 1);
}
int main(void) {
	int N;
	cin >> N;
	s = 1 << (int)ceil(log2(2 * N - 1));
	int i;
	init();
	int a;
	cin >> a;
	ans.push_back(a);
	update(a + s - 1);
	arr[a] = 1;
	int p, q;
	p = 1;
	q = 2 * N - 1;
	for (i = 1; i <= N - 1; i++) {
		cin >> a;
		if (arr[a] == 0) {
			ans.push_back(a);
			update(a);
			arr[a] = 1;
			if (sumquery(1, a) < sumquery(a, 2 * N - 1)) {
				while (arr[p] == 1) p++;
				ans.push_back(p);
				update(p + s - 1);
				arr[p] = 1;
			}
			else {
				while (arr[q] == 1) q--;
				ans.push_back(q);
				update(q + s - 1);
				arr[q] = 1;
			}
		}
		else {
			int r1, r2;
			r1 = sumquery(1, a);
			r2 = sumquery(a, 2 * N - 1);
			if (r1 < r2) {
				while (arr[p] == 1) p++;
				ans.push_back(p);
				update(p + s - 1);
				arr[p] = 1;
				while (arr[p] == 1) p++;
				ans.push_back(p);
				update(p + s - 1);
				arr[p] = 1;
			}
			else if (r1 > r2) {
				while (arr[q] == 1) q--;
				ans.push_back(q);
				update(q + s - 1);
				arr[q] = 1;
				while (arr[q] == 1) q--;
				ans.push_back(q);
				update(q + s - 1);
				arr[q] = 1;
			}
			else {
				while (arr[p] == 1) p++;
				ans.push_back(p);
				update(p + s - 1);
				arr[p] = 1;
				while (arr[q] == 1) q--;
				ans.push_back(q);
				update(q + s - 1);
				arr[q] = 1;
			}
		}
	}
	for (auto i : ans) cout << i << endl;
}

• Subtask 1: 10 / 65
• Subtask 2: 0 / 35